JP3682796B2 - Liquid crystal display element and liquid crystal composition - Google Patents

Abstract

An active OCB (Optically Compensated Bend or Birefringence) element for switching respective pixels of a sealed cell formed by two substrates having transparent electrodes, wherein a nematic liquid crystal composition contained in the cell comprises one or more than one terminal group structure(s) of the following general formula (I): <CHEM> as the first component (wherein, X denotes F, Cl, CF3, OCF3, CF2H, OCF2H, OCF2CF2H, OCF2Cl or OCF2CFHCF3, Q<1> and Q<2> denote independently each other H or F.) as the first component.

Description

（式中、ＸはＦ、Ｃｌ、ＣＦ₃、ＯＣＦ₃、ＣＦ₂Ｈ、ＯＣＦ₂Ｈ、ＯＣＦ₂ＣＦ₂Ｈ、ＯＣＦ₂ＣｌまたはＯＣＦ₂ＣＦＨＣＦ₃を示し、Ｑ¹およびＱ²は各々独立してＨまたはＦを示す。）
この一般式（I）で極性を有する末端基構造を持つ化合物を使用する事で、液晶組成物の誘電率異方性（Δε）を大きくする事ができる。よって、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を小さくする事が可能と成るために、結果として低電圧駆動のアクティブ駆動ＯＣＢ素子を実現する事が出来る。さらには、一般式（I）における末端基はフッ素、塩素系の極性基であるために、高い誘電率異方性（Δε）を有するにも関わらず、高比抵抗値を実現することができ、熱的安定性、化学的安定性にも優れている。よって、これら化合物を使用した液晶組成物の電圧保持率（Ｖ．Ｈ．Ｒ）は高い。即ち、高コントラストを保つたアクティブ駆動ＯＣＢ素子を実現できる。
また、一般式（I）において極性基Ｘが同じ場合は、ラテラル（Ｑ¹およびＱ²）にＦを有する化合物の方がＦを有しない場合と比較して、弾性定数Ｋ₃、Ｋ₁の絶対値が小さく、かつ誘電率異方性（Δε）が大きい。よって、一般式（I）に含まれるラテラルにＦを有する化合物を使用する事により、弾性定数Ｋ₃、Ｋ₁の絶対値が小さく、かつ誘電率異方性（Δε）が大きい液晶組成物を調製することが可能と成る。
結果として低電圧駆動のアクティブ駆動ＯＣＢ素子を実現する事が出来る。また、これら式（Ｉ）に含まれるラテラルにＦを有する化合物も先に述べた通り、高い誘電率異方性（Δε）を有するにも関わらず、高比抵抗値を有することから、高い電圧保持率（Ｖ．Ｈ．Ｒ）を実現する事が可能である。
【０００５】
本発明の第２の発明は、一般式（Ｉ）の化合物が、一般式（Ｉ−ａ）、（Ｉ−ｂ）および（Ｉ−ｃ）
【化３３】

【化３４】

【化３５】

（式中、Ｒ¹ は炭素数１〜１０のアルキル基またはフルオロアルキル基を示し、基中の任意の１つまたは相隣接しない２つ以上のメチレン基（−ＣＨ₂ −）は酸素原子または−ＣＨ＝ＣＨ−によって置換されても良い。ＸはＦ、Ｃｌ、ＣＦ₃ 、ＯＣＦ₃ 、ＣＦ₂ Ｈ、ＯＣＦ₂ Ｈ、ＯＣＦ₂ ＣＦ₂ Ｈ、ＯＣＦ₂ ＣｌまたはＯＣＦ₂ ＣＦＨＣＦ₃ を示し、Ｑ¹ およびＱ² は各々独立してＨまたはＦを示し、Ｚ¹ ，Ｚ² 、Ｚ³ 、Ｚ⁴ 、Ｚ⁵ 、Ｚ⁶ は各々独立して−ＣＨ₂ ＣＨ₂ −、−（ＣＨ₂ ）₄ −、−ＣＯＯ−、−ＣＦ₂ Ｏ−、−ＣＨ＝ＣＨ−または単結合を示し、Ａ、Ｂ、Ｃ、Ｄ、Ｅ は各々独立してトランス−１，４−シクロヘキシレン、ピリミジン−２，５−ジイル、１，４−シクロヘキセニレンまたは側位のＨがＦで置換されても良い１，４−フェニレンを示す。）で表される化合物であることを特徴とする上記第一の説明に記載の液晶表示素子に関する。
これら、一般式（Ｉ−ａ）、（Ｉ−ｂ）および（Ｉ−ｃ）の化合物を組み合わせる事により、液晶組成物の誘電率異方性（Δε）、透明点（ＮＩ点）を任意に調整できる。特にＺ¹ ，Ｚ² 、Ｚ³ 、Ｚ⁴ 、Ｚ⁵ 、Ｚ⁶ の結合が、−ＣＯＯ−、−ＣＦ₂ Ｏ−を有する化合物は、−ＣＨ₂ ＣＨ₂ −、−ＣＨ＝ＣＨ−または単結合を有するものと比較して、誘電率異方性（Δε）が大きく、加えて−ＣＯＯ−結合を、有する化合物の場合は弾性定数Ｋ₃ 、Ｋ₁ の絶対値が小さい。よって、これら−ＣＯＯ−、−ＣＦ₂ Ｏ−を有する化合物を含んだ液晶組成物を使用する事により、結果として非常に低電圧駆動のアクティブ駆動ＯＣＢ素子を実現する事が出来る。
さらにＺ¹ 、Ｚ² 、Ｚ³ 、Ｚ⁴ 、Ｚ⁵ 、Ｚ⁶ に−ＣＯＯ−、−ＣＦ₂ Ｏ−を有する化合物のうち、ラテラルにＦを有するものは、ラテラルにＦを有しない化合物と比較してより、誘電率異方性（Δε）が大きく、また弾性定数Ｋ₃ 、Ｋ₁ の絶対値がさらに小さい為に、さらにより低電圧駆動のアクティブ駆動ＯＣＢ素子を実現する事が出来る。
また、これら一般式（Ｉ−ａ）、（Ｉ−ｂ）および（Ｉ−ｃ）により示される化合物はフッ素系、塩素系の極性基を有するために、これらを使用した液晶組成物は高比抵抗値を示し、熱的安定性、化学的安定性にも優れている。よって、液晶組成物の電圧保持率（Ｖ．Ｈ．Ｒ）を高くする事が可能と成る。即ち、高コントラストを保ったアクティブ駆動ＯＣＢ素子を実現できる。
また、一般式（Ｉ−ａ）、（Ｉ−ｂ）および（Ｉ−ｃ）のうち、ピリミジン−２，５−ジイルを有する化合物は、弾性定数比Ｋ₃ ／Ｋ₁ が１．３以下と非常に小さく、かつ屈折率異方性（Δｎ）がΔｎ≦０．２と大きい。よって、これらピリミジン−２，５−ジイルを有する化合物を使用する事で、液晶組成物の弾性定数比がＫ₃ ／Ｋ₁ を特に小さく、かつ屈折率異方性（Δｎ）を特に大きく調整する事が出来るために、低電圧駆動、高コントラスト、かつ広視野角のアクティブ駆動ＯＣＢ素子を実現する事が出来る。
【０００６】
本発明の第３の発明は、第１成分の使用量が、液晶組成物の全重量に対して５０〜１００重量％であることを特徴とする上記第１の発明または、第２の発明に記載の液晶表示素子に関する。
【０００７】
本発明の第４の発明は、第２成分として、一般式（II）、（III ）および（IV）
【化３６】

（式中、Ｒ² およびＲ³ は各々独立して炭素数１〜１０のアルキル基またはフルオロアルキル基を示すが、基中の任意の１つまたは相隣接しない２つ以上のメチレン基（−ＣＨ₂ −）は酸素原子（−Ｏ−）または−ＣＨ＝ＣＨ−によって置換されても良い。ＧおよびＪは各々独立してトランス−１，４−シクロヘキシレン、１，４−フェニレンまたはピリミジン−２，５−ジイルを示し、Ｚ⁷ は−ＣＨ₂ ＣＨ₂ −、−ＣＯＯ−、−ＣＨ＝ＣＨ−、−Ｃ≡Ｃ−または単結合を示す。）
【化３７】

（式中、Ｒ⁴ およびＲ⁵ は各々独立して炭素数１〜１０のアルキル基またはフルオロアルキル基を示す。いずれにおいても基中の任意の１つまたは相隣接しない２つ以上のメチレン基（−ＣＨ₂ −）は酸素原子（−Ｏ−）または−ＣＨ＝ＣＨ−によって置換されても良い。Ｋはトランス−１，４−シクロヘキシレン、１，４−フェニレンまたはピリミジン−２，５−ジイルを示し、ＬおよびＭは、それぞれ独立して、トランス−１，４−シクロヘキシレンまたは側位の１つのＨがＦで置換されてもよい１，４−フェニレンを示す。Ｚ⁸ およびＺ⁹ は各々独立して、−ＣＨ₂ ＣＨ₂ −、−ＣＨ＝ＣＨ−、−Ｃ≡Ｃ−、−ＣＯＯ−、または単結合を示す。）
【化３８】

（式中、Ｒ⁶ およびＲ⁷ は各々独立して炭素数１〜１０のアルキル基またはフルオロアルキル基を示し、基中の任意の１つまたは相隣接しない２つ以上のメチレン基（−ＣＨ₂ −）は酸素原子（−Ｏ−）または−ＣＨ＝ＣＨ−によって置換されても良い。Ｑ³ はＨまたはＦを示す。）で示される化合物群から選択される少なくとも１種以上をさらに含有することを特徴とする上記第１〜３の発明に記載の液晶表示素子に関する。
これら一般式（II）、（III ）および（IV）で示される第２成分の化合物は極性の大きな置換基を有しないために、これら化合物中では不純物イオンは安定に存在できない。よって、これら第２成分の化合物の比抵抗値は非常に高く、また熱的安定性、化学的安定性にも非常に優れている。よって、これら第２成分と第１成分を組み合わせる事で、誘電率異方性（Δε）が大きく、弾性定数Ｋ₃ 、Ｋ₁ の絶対値及び弾性定数比 Ｋ₃ ／Ｋ₁ が小さく、かつ電圧保持率（Ｖ．Ｈ．Ｒ）が非常に高く、熱的安定性、化学的安定性にも優れた液晶組成物を調整する事ができる。よって、低電圧駆動、高コントラスト、広視野角、高信頼性を保ったアクティブ駆動ＯＣＢ素子を実現できる。
また、一般式（II）、（III ）および（IV）の中で、４−４’−ビフェニレンを骨格として含む化合物、１，４−フェニレンとピリミジン−２，５−ジイルが結合した骨格を含む化合物、４−４’−ビフェニレン中の２つのベンゼン環の間に−ＣＨ＝ＣＨ−を有する骨格を含んだ化合物、４−４’−ビフェニレン中の２つのベンゼン環の間に−Ｃ≡Ｃ−を有する骨格を含んだ化合物、およびこれら骨格のいずれか２つ以上を含む化合物（これら化合物の骨格に含まれる１，４−フェニレン中の任意のＨはＦに置換されても良い）はその屈折率異方性（Δｎ）がΔｎ≦０．２と非常に大きい。よって、これら骨格を含む化合物を使用することで、液晶組成物の屈折率異方性（Δｎ）を大きくする事ができるために、高コントラスト、広視野角のアクティブ駆動ＯＣＢ素子を実現できる。
また、一般式（II）、（III ）および（IV）の中で、その骨格中にピリミジン−２，５−ジイルを含む化合物はその弾性定数Ｋ₃ 、Ｋ₁ の絶対値が小さく、さらに弾性定数比Ｋ₃ ／Ｋ₁ ＜１．３と非常に小さい。よって、骨格中にピリミジン−２，５−ジイルを含む化合物を使用することで、液晶組成物のＫ₃ 、Ｋ₁ 絶対値及び弾性定数比Ｋ ₃／Ｋ₁ を小さくする事ができるために、低電圧駆動、高コントラスト、広視野角のアクティブ駆動ＯＣＢ素子を実現できる。
さらに、一般式（III ）および（IV）で示される化合物はその透明点（ＮＩ点）がＮＩ≧１００℃と高く、屈折率異方性（Δｎ）が△ｎ≧０．１と大きいため、第１成分と組み合わせることにより、誘電率異方性（Δε）、弾性定数Ｋ₃ 、Ｋ₁ の絶対値及び弾性定数比Ｋ₃ ／Ｋ₁ が小さく、かつ屈折率異方性（Δｎ）が大きく、透明点（ＮＩ点）が高く、なおかつ電圧保持率（Ｖ．Ｈ．Ｒ）が非常に大きく、熱的安定性、化学的安定性に優れた液晶組成物を調製できる。よって、低電圧駆動、高コントラスト、広視野角、高信頼性でかつ、駆動温度範囲の広いアクティブ駆動ＯＣＢ素子を実現できる。
【０００８】
本発明の第５の発明は、第２成分の使用量が、液晶組成物の全重量に対して４０重量％以下であることを特徴とする上記第４の発明に記載の液晶表示素子に関する。
【０００９】
本発明の第６の発明は、第３成分として一般式（VI−ａ），（VI−ｂ），（VI−ｃ），（VI−ｄ），（VI−ｅ）
【化３９】

【化４０】

【化４１】

【化４２】

【化４３】

（式中、Ｒ⁸ は炭素数１〜１０のアルキル基またはフルオロアルキル基を示し、基中の任意の１つまたは相隣接しない２つ以上のメチレン基（−ＣＨ₂ −）は酸素原子（−Ｏ−）または−ＣＨ＝ＣＨ−によって置換されても良い。Ｒ⁹ は炭素数１〜１０のアルキル基、フルオロアルキル基または、ＣＦ₃ 、ＣＦ₂ Ｈ、を示し、基中の１つまたは相隣接しない２つ以上のメチレン基（−ＣＨ₂ −）は酸素原子（−Ｏ−）または−ＣＨ＝ＣＨ−によって置換されても良い。Ｚ¹⁰およびＺ¹¹は各々独立して−ＣＨ₂ ＣＨ₂ −、−ＣＯＯ−または単結合を示す。）で示される化合物群から選択される１種またはそれ以上の化合物をさらに含有することを特徴とする上記第４の発明または第５の発明に記載の液晶表示素子に関する。
【００１０】
本発明の第７の発明は第３成分の使用量が、液晶組成物の全重量に対して２０重量％以下であることを特徴とする上記第６の発明に記載の液晶表示素子に関する。
【００１１】
本発明の第８の発明は、液晶組成物のネマチック相範囲が６０℃以上、光学異方性Δｎが０．１以上、ｓｐｌａｙモードおよびｂｅｎｄモードの弾性定数比Ｋ₃ ／Ｋ₁ が１．７以下、誘電率異方性Δεが５．０以上であることを特徴とする上記第１〜第７の発明のいずれかに記載の液晶表示素子に関する。
【００１２】
本発明の第９、１０、１１の発明は上記第１〜第４もしくは第６の発明のいずれかに定義されている組成を有する液晶組成物に関する。
【００１３】
本発明におけるアクティブ駆動ＯＣＢ素子に使用される液晶組成物の第１成分の使用量は、液晶組成物の全重量に対して５０〜１００重量％が好ましい。５０重量％以下だとスプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）が高くなり実用上好ましくない。
第２成分の使用量は液晶組成物の全重量に４０重量％以下が好ましい。４０重量％を超えるとスプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）が高くなり好ましくない。より好ましくは３０重量％以下が好ましい。
【００１４】
本発明で使用される液晶組成物は使用されるアクティブ駆動ＯＣＢ素子の目的に応じて、上記一般式（Ｉ）〜（VI）で表される化合物の他、しきい値電圧、ネマティックレンジ、Δｎ、誘電率異方性、粘度等を調整する目的で、他の化合物を本発明の目的を害さない範囲で適当量含有することができる。
【００１５】
本発明に従い使用される液晶組成物は、それ自体慣用な方法で調整される。一般には、種々の成分を高い温度で互いに溶解させる方法がとられている。
【００１６】
【実施例】
以下、実施例により本発明を詳細に説明するが、本発明はこれらの実施例に限定されるものではない。比較例、実施例の組成比は全て重量％で示されている。電圧保持率の測定値を記載しているが、この測定は面積法に基づいて実施した。また、各化合物の表記方法は表１に従っている。
【００１７】
【表１】

【００１８】
実施例１
３−ＨＢ−ＣＬ ７. ０％
２−ＨＨＢ−ＣＬ ５. ０％
４−ＨＨＢ−ＣＬ １０. ０％
５−ＨＨＢ−ＣＬ ４. ０％
２−ＨＨＢ（Ｆ）−Ｆ ４. ０％
３−ＨＨＢ（Ｆ）−Ｆ ４. ０％
５−ＨＨＢ（Ｆ）−Ｆ ４. ０％
２−ＨＢＢ（Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ）−Ｆ １０. ０％
５−ＨＢＢ（Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １６. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ １６. ０％
からなる液晶組成物の透明点はＴ_NI＝９０．４（℃）、２０℃における粘度はη₂₀＝２４．２（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１９、２０℃における誘電率異方性はΔε＝６．８、２５℃における弾性定数Ｋ₃ は１４．８（ＰＮ）、Ｋ₁ は８. ９８（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１．６５であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２. ２１（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９９．３％であった。
【００１９】
実施例２
３−ＰｙＢ（Ｆ）−Ｆ １２. ０％
７−ＨＢ（Ｆ）−Ｆ １１. ０％
２−ＨＨＢ（Ｆ）−Ｆ ９. ０％
３−ＨＨＢ（Ｆ）−Ｆ ８. ０％
５−ＨＨＢ（Ｆ）−Ｆ ８. ０％
２−ＨＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＢＢ（Ｆ）−Ｆ ８. ０％
５−ＨＢＢ（Ｆ）−Ｆ ７．０％
３−ＨＨＥＢ−Ｆ ５. ０％
５−ＨＨＥＢ−Ｆ ５. ０％
３−ＨＢＥＢ−Ｆ ６. ０％
３−ＰｙＢＢ−Ｆ ７. ０％
４−ＰｙＢＢ−Ｆ ６. ０％
からなる液晶組成物の透明点はＴ_NI＝８０．７（℃）、２０℃における粘度はη₂₀＝２６．９（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１２２、２０℃における誘電率異方性はΔε＝８．６、２５℃における弾性定数Ｋ₃ は１１．８（ＰＮ）、Ｋ₁ は９. ８４（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１．２０であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ８２（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．５％であった。
【００２０】
実施例３
３−Ｈ２ＢＢ（Ｆ，Ｆ）−Ｆ １０. ０％
５−Ｈ２ＢＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ ６. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２９. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２９. ０％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ３. ０％
５−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ３. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ １０. ０％
からなる液晶組成物の透明点はＴ_NI＝６１．５（℃）、２０℃における粘度はη₂₀＝３４．０（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１４、２０℃における誘電率異方性はΔε＝１０．３、２５℃における弾性定数比Ｋ₃ ／Ｋ₁ が１．６２であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ５５（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．９％であった。
【００２１】
実施例４
３−Ｈ２ＨＢ（Ｆ，Ｆ）−Ｆ ５．０％
５−Ｈ２ＨＢ（Ｆ，Ｆ）−Ｆ ５. ０％
３−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ ６. ０％
４−Ｈ２ＢＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２９. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２９. ０％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ３. ０％
５−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ３. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ １０. ０％
からなる液晶組成物の透明点はＴ_NI＝６３．２（℃）、２０℃における粘度はη₂₀＝３４．３（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１０８、２０℃における誘電率異方性はΔε＝１０．０、２５℃における弾性定数比Ｋ₃ ／Ｋ₁ が１．６５であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ６３（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．６％であった。
【００２２】
実施例５
３−Ｈ２ＨＢ（Ｆ，Ｆ）−Ｆ ５. ０％
５−Ｈ２ＨＢ（Ｆ，Ｆ）−Ｆ ５. ０％
３−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ ９. ０％
５−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ ９. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２６. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２６. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ２. ０％
５−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ２. ０％
３−ＨＨＢＢ（Ｆ，Ｆ）−Ｆ ４. ０％
３−ＨＨ２ＢＢ（Ｆ，Ｆ）−Ｆ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝８３．８（℃）、２０℃における粘度はη₂₀＝３１．９（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１０、２０℃における誘電率異方性はΔε＝１０．５、２５℃における弾性定数比Ｋ₃ ／Ｋ₁ が１．６９であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ７０（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９９．０％であった。
【００２３】
実施例６
３−ＨＨＢ（Ｆ，Ｆ）−Ｆ ８. ０％
３−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ １０. ０％
５−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２６. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２６. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ２. ０％
５−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ２. ０％
３−ＨＨＢＢ（Ｆ，Ｆ）−Ｆ ６. ０％
からなる液晶組成物の透明点はＴ_NI＝８２．２（℃）、２０℃における粘度はη₂₀＝３２．３（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１０、２０℃における誘電率異方性はΔε＝１０．６であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ６９（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９９．２％であった。
【００２４】
実施例７
２−ＨＨＥＢＢ（Ｆ，Ｆ）−Ｆ ７．０％
５−ＨＨＥＢＢ（Ｆ，Ｆ）−Ｆ ３．０％
５−ＨＢ−Ｆ ３．０％
７−ＨＢ−Ｆ ４．０％
２−ＨＨＢ−ＯＣＦ₃ １２. ０％
３−ＨＨＢ−ＯＣＦ₃ １２. ０％
５−ＨＨＢ−ＯＣＦ₃ １０. ０％
２−Ｈ２ＨＢ−ＯＣＦ₃ ６. ０％
３−Ｈ２ＨＢ−ＯＣＦ₃ ６. ０％
４−Ｈ２ＢＢ（Ｆ）−Ｆ １５. ０％
５−Ｈ２ＢＢ（Ｆ）−Ｆ １４. ０％
３−ＨＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ４. ０％
３−Ｈ２ＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ２. ０％
３−ＨＢＢ−ＯＣＦ₂ ＣＦＨＣＦ₃ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝１１０．５（℃）、２０℃における粘度はη₂₀＝２２．５（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１０６、２０℃における誘電率異方性はΔε＝５．４であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２. ６５（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．５％であった。
【００２５】
実施例８
５−Ｈ４ＨＢ−ＯＣＦ₃ ７. ０％
４−Ｈ２ＢＢ（Ｆ）−Ｆ ８. ０％
５−Ｈ２ＢＢ（Ｆ）−Ｆ ７. ０％
３−ＨＢＢ−ＯＣＦ₂ ＣＦＨＣＦ₃ ７. ０％
３−ＨＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ７. ０％
５−ＢＢ−ＯＣＦ₂ Ｈ ４. ０％
３−ＨＥＢ−ＯＣＦ₃ ３. ０％
５−ＨＨＥＢ−ＯＣＦ₃ ７. ０％
２−ＨＨＢ（Ｆ）−Ｆ ５. ０％
３−ＨＨＢ（Ｆ）−Ｆ ５. ０％
５−ＨＨＢ（Ｆ）−Ｆ ４. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ ７. ０％
５−Ｈ２Ｂ（Ｆ）−Ｆ １０. ０％
７−ＨＢ（Ｆ，Ｆ）−Ｆ ９. ０％
３−ＨＢＥＢ−Ｆ １０. ０％
からなる液晶組成物の透明点はＴ_NI＝７２．７（℃）、２０℃における粘度はη₂₀＝２２．３（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１０１、２０℃における誘電率異方性はΔε＝５．５であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２. １２（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．２％であった。
【００２６】
実施例９
５−Ｈ４ＨＢ−ＯＣＦ₃ ８. ０％
４−Ｈ２ＢＢ（Ｆ）−Ｆ ９. ０％
５−Ｈ２ＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ８. ０％
３−ＨＢＢ（Ｆ）−ＯＣＦ₂ ＣＦ₂ Ｈ ８. ０％
３−ＨＨＢ−ＯＣＦ₃ ８. ０％
３−ＨＨＢ（Ｆ，Ｆ）−Ｆ ８. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １２. ０％
５−ＨＢ−ＣＬ ８. ０％
５−ＨＨＢ−ＣＬ ４. ０％
３−ＨＢ−ＣＬ ９. ０％
５−Ｈ２Ｂ（Ｆ）−Ｆ １０. ０％
からなる液晶組成物の透明点はＴ_NI＝６２．２（℃）、２０℃における粘度はη₂₀＝１８．２（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１００、２０℃における誘電率異方性はΔε＝５．２であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２. １４（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．４％であった。
【００２７】
実施例１０
５−Ｈ４ＨＢ−ＯＣＦ₃ ８. ０％
４−Ｈ２ＢＢ（Ｆ）−Ｆ ９. ０％
５−Ｈ２ＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＨ２Ｂ−ＯＣＦ₃ ４. ０％
３−Ｈ２ＨＢ−ＯＣＦ₃ ４. ０％
３−ＨＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ８. ０％
３−ＨＢＢ（２Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ４. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １２. ０％
５−ＨＨＥＢ−ＯＣＦ₃ ３. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ ８. ０％
５−ＨＢ−ＣＬ ７. ０％
５−ＨＨＢ−ＣＬ ５. ０％
５−Ｈ２Ｂ（Ｆ）−Ｆ １０. ０％
２−ＨＥＢ−Ｆ １０. ０％
からなる液晶組成物の透明点はＴ_NI＝６０．６（℃）、２０℃における粘度はη₂₀＝２０．０（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１０５、２０℃における誘電率異方性はΔε＝５．６であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ９７（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．３％であった。
【００２８】
実施例１１
３−ＰｙＢ（Ｆ）−Ｆ １２. ０％
７−ＨＢ（Ｆ）−Ｆ １１. ０％
２−ＨＨＢ（Ｆ）−Ｆ ７. ０％
３−ＨＨＢ（Ｆ）−Ｆ ７. ０％
５−ＨＨＢ（Ｆ）−Ｆ ７. ０％
Ｖ−ＨＨＢ（Ｆ）−Ｆ ２. ０％
Ｖ２−ＨＨＢ（Ｆ）−Ｆ ２. ０％
２−ＨＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＢＢ（Ｆ）−Ｆ ８. ０％
５−ＨＢＢ（Ｆ）−Ｆ ７. ０％
３−ＨＨＥＢ−Ｆ ５. ０％
５−ＨＨＥＢ−Ｆ ５. ０％
３−ＨＢＥＢ−Ｆ ６. ０％
３−ＰｙＢＢ−Ｆ ７. ０％
４−ＰｙＢＢ−Ｆ ６. ０％
からなる液晶組成物の透明点はＴ_NI＝８１．０（℃）、２０℃における粘度はη₂₀＝２６．８（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１２８、２０℃における誘電率異方性はΔε＝８．７、２５℃における弾性定数Ｋ₃ は１２．２（ＰＮ）、Ｋ₁ は９. ８８（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１．２３であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ８７（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．１％であった。
【００２９】
実施例１２
Ｖ−ＨＨＢ（Ｆ，Ｆ）−Ｆ ３. ０％
３−ＨＨＢ（Ｆ，Ｆ）−Ｆ ５. ０％
３−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ １０. ０％
５−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２６. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２６. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ２. ０％
５−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ２. ０％
３−ＨＨＢＢ（Ｆ，Ｆ）−Ｆ ６. ０％
からなる液晶組成物の透明点はＴ_NI＝８２．５（℃）、２０℃における粘度はη₂₀＝３２．０（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１３、２０℃における誘電率異方性はΔε＝１０．６であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ７２（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．７％であった。
【００３０】
実施例１３
７−ＨＢ（Ｆ，Ｆ）−Ｆ ３. ０％
２−ＨＨＢ（Ｆ）−Ｆ ２. ０％
３−ＨＨＢ（Ｆ）−Ｆ ３. ０％
５−ＨＨＢ（Ｆ）−Ｆ ３. ０％
２−ＨＢＢ（Ｆ）−Ｆ ９. ０％
３−ＨＢＢ（Ｆ）−Ｆ ９. ０％
５−ＨＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＢＢ−Ｆ ４. ０％
５−ＨＢＢ−Ｆ ３. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １５. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ １５. ０％
３−ＨＢ−Ｏ２ ７. ０％
３−ＨＨ−４ ４. ０％
３−ＨＢ（Ｆ）ＴＢ−２ ５. ０％
３−ＨＢ（Ｆ）ＴＢ−３ ５. ０％
３−ＨＢ（Ｆ）ＴＢ−４ ５. ０％
からなる液晶組成物の透明点はＴ_NI＝９２．１（℃）、２０℃における粘度はη₂₀＝２７．６（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１４０、２０℃における誘電率異方性はΔε＝５．５、２５℃における弾性定数Ｋ₃ は１２．９（ＰＮ）、Ｋ₁ は１０．９（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１．１８であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２. ３０（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９９．０％であった。
【００３１】
実施例１４
３−ＰｙＢ（Ｆ）−Ｆ １６. ０％
７−ＨＢ（Ｆ）−Ｆ １２. ０％
２−ＨＨＢ（Ｆ）−Ｆ １２. ０％
３−ＨＨＢ（Ｆ）−Ｆ １２. ０％
５−ＨＨＢ（Ｆ）−Ｆ １２. ０％
３−ＰｙＢＢ−Ｆ ８. ０％
４−ＰｙＢＢ−Ｆ ８. ０％
５−ＰｙＢＢ−Ｆ ８. ０％
２−ＰｙＢ−２ ２. ０％
２−ＰｙＢＨ−３ ３. ０％
３−ＰｙＢＨ−３ ３. ０％
４−ＰｙＢＨ−３ ４. ０％
からなる液晶組成物の透明点はＴ_NI＝８３．８（℃）、２０℃における粘度はη₂₀＝５０．９（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１４０、２０℃における誘電率異方性はΔε＝９．０、２５℃における弾性定数Ｋ₃ は１５．３（ＰＮ）、Ｋ₁ は１６．６（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が０．９２であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２. １５（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．３％であった。
【００３２】
実施例１５
３−ＰｙＢ（Ｆ）−Ｆ １１. ０％
５−ＰｙＢ（Ｆ）−Ｆ １２. ０％
３−ＨＨＥＢ−Ｆ ５. ０％
５−ＨＨＥＢ−Ｆ ５. ０％
３−ＨＢＥＢ−Ｆ ６. ０％
３−ＰｙＢＢ−Ｆ ８. ０％
４−ＰｙＢＢ−Ｆ ８. ０％
５−ＰｙＢＢ−Ｆ ８. ０％
３−ＨＢ−Ｏ２ ２０. ０％
３−ＨＥＢ−Ｏ４ １. ４％
４−ＨＥＢ−Ｏ２ １. ０％
５−ＨＥＢ−Ｏ１ １. ０％
３−ＨＥＢ−Ｏ２ ０. ９％
５−ＨＥＢ−Ｏ２ ０. ７％
２−ＰｙＢＨ−３ ４. ０％
３−ＰｙＢＨ−３ ４. ０％
４−ＰｙＢＨ−３ ４. ０％
からなる液晶組成物の透明点はＴ_NI＝８１．２（℃）、２０℃における粘度はη₂₀＝２７．８（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１５９、２０℃における誘電率異方性はΔε＝７．９、２５℃における弾性定数Ｋ₃ は１４．０（ＰＮ）、Ｋ₁ は１４．０（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１．００であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１. ９８（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．１％であった。
【００３３】
実施例１６
２−ＰｙＢ−Ｆ ２. ０％
３−ＰｙＢ（Ｆ）−Ｆ １０. ０％
５−ＰｙＢ（Ｆ）−Ｆ １１. ０％
３−ＨＨＥＢ−Ｆ ５. ０％
５−ＨＨＥＢ−Ｆ ５. ０％
３−ＨＢＥＢ−Ｆ ６. ０％
３−ＰｙＢＢ−Ｆ ８. ０％
４−ＰｙＢＢ−Ｆ ８. ０％
５−ＰｙＢＢ−Ｆ ６. ０％
３−ＰｙＢ−Ｏ１ ２. ０％
３−ＨＢ−Ｏ２ ２０. ０％
３−ＨＥＢ−Ｏ４ ２. ０％
５−ＨＥＢ−１ ２. ０％
１Ｏ−ＢＥＢ−２ １. ０％
２−ＰｙＢＨ−３ ４. ０％
３−ＰｙＢＨ−３ ４. ０％
４−ＰｙＢＨ−３ ２. ０％
３−ＰｙＢＢ−２ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝８０．０（℃）、２０℃における粘度はη₂₀＝２８．７（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１７００、２０℃における誘電率異方性はΔε＝７．０、２５℃における弾性定数Ｋ₃ は１３．８（ＰＮ）、Ｋ₁ は１３. ７（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１. ０１であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．０８（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．１％であった。
【００３４】
実施例１７
７−ＨＢ（Ｆ）−Ｆ ８. ０％
７−ＨＢ（Ｆ，Ｆ）−Ｆ １０. ０％
２−ＨＢＢ（Ｆ）−Ｆ １３. ０％
３−ＨＢＢ（Ｆ）−Ｆ １３. ０％
５−ＨＢＢ（Ｆ）−Ｆ １２. ０％
３−ＨＢ（Ｆ）ＴＢ−２ ６. ０％
３−ＨＢ（Ｆ）ＴＢ−３ ６. ０％
３−ＨＢ（Ｆ）ＴＢ−４ ６. ０％
３−Ｈ２ＢＴＢ−２ ４. ０％
３−Ｈ２ＢＴＢ−３ ４. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ９. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ ９. ０％
からなる液晶組成物の透明点はＴ_NI＝８３．４（℃）、２０℃における粘度はη₂₀＝３０．８（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１４６、２０℃における誘電率異方性はΔε＝６．２、２５℃における弾性定数Ｋ₃ は１０．９（ＰＮ）、Ｋ₁ は１０. ４（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１. ０５であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．１８（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９９．０％であった。
【００３５】
実施例１８
７−ＨＢ（Ｆ，Ｆ）−Ｆ ７. ０％
２−ＢＴＢ−Ｏ１ １１. ０％
３−ＨＢ−Ｏ２ ３. ０％
２−ＨＢＢ（Ｆ）−Ｆ １２. ０％
３−ＨＢＢ（Ｆ）−Ｆ １１. ０％
５−ＨＢＢ（Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １０. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ １１. ０％
３−Ｈ２ＢＴＢ−２ ３. ０％
３−Ｈ２ＢＴＢ−３ ４. ０％
３−ＨＢ（Ｆ）ＴＢ−２ ６. ０％
３−ＨＢ（Ｆ）ＴＢ−３ ６. ０％
３−ＨＢ（Ｆ）ＴＢ−４ ６. ０％
からなる液晶組成物の透明点はＴ_NI＝９６．１（℃）、２０℃における粘度はη₂₀＝３５．９（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１７９、２０℃における誘電率異方性はΔε＝５．５であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．５２（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．７％であった。
【００３６】
実施例１９
７−ＨＢ（Ｆ，Ｆ）−Ｆ ３. ０％
２−ＨＨＢ（Ｆ）−Ｆ ２. ０％
３−ＨＨＢ（Ｆ）−Ｆ ３. ０％
５−ＨＨＢ（Ｆ）−Ｆ ３. ０％
２−ＨＢＢ（Ｆ）−Ｆ ９. ０％
３−ＨＢＢ（Ｆ）−Ｆ ９. ０％
５−ＨＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＢＢ−Ｆ ３. ０％
５−ＨＢＢ−Ｆ ３. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １５. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ １５. ０％
３−ＨＢ−Ｏ２ ７. ０％
３−ＨＨ−４ ４. ０％
３−ＨＢ（Ｆ）ＴＢ−２ ５. ０％
３−ＨＢ（Ｆ）ＴＢ−３ ５. ０％
３−ＨＢ（Ｆ）ＴＢ−４ ４. ０％
２−ＢＴＢ−１ １. ０％
３−ＨＨＢ−Ｆ １. ０％
からなる液晶組成物の透明点はＴ_NI＝９１．３（℃）、２０℃における粘度はη₂₀＝２７．０（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１４６、２０℃における誘電率異方性はΔε＝５．３、２５℃における弾性定数Ｋ₃ は１２．０（ＰＮ）、Ｋ₁ は１０．１（ＰＮ）、弾性定数比Ｋ₃ ／Ｋ₁ が１．１９であった。この液晶組成物を厚さ６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２. ２７（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．８％であった。
【００３７】
実施例２０
２−ＨＨＥＢＢ（Ｆ，Ｆ）−Ｆ ５. ０％
３−ＨＢ−ＣＬ ５. ０％
２−ＨＨＢ（Ｆ）−Ｆ １０. ０％
３−ＨＨＢ（Ｆ）−Ｆ １０. ０％
５−ＨＨＢ（Ｆ）−Ｆ １０. ０％
２−ＨＢＢ（Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ）−Ｆ １０. ０％
５−ＨＢＢ（Ｆ）−Ｆ １０. ０％
２−ＨＢＢ−Ｆ ５. ０％
３−ＨＢＢ−Ｆ ５. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ８. ０％
３−ＨＨＢＢ（Ｆ，Ｆ）−Ｆ ３. ０％
３−ＨＢ（Ｆ）ＶＢ−２ ５. ０％
３−ＨＢ（Ｆ）ＶＢ−３ ４. ０％
からなる液晶組成物の透明点はＴ_NI＝１１５. ０（℃）、２０℃における粘度はη₂₀＝２７．７（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１３４、２０℃における誘電率異方性はΔε＝５．７であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．５１（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９９．４％であった。
【００３８】
実施例２１
５−ＨＨＥＢＢ（Ｆ，Ｆ）−Ｆ ５. ０％
５−Ｈ２Ｂ（Ｆ）−Ｆ １０. ０％
７−ＨＢ（Ｆ）−Ｆ ３. ０％
７−ＨＥＢ−Ｆ ２. ０％
２−ＨＨＢ（Ｆ）−Ｆ １０. ０％
３−ＨＨＢ（Ｆ）−Ｆ １０. ０％
５−ＨＨＢ（Ｆ）−Ｆ １０. ０％
２−ＨＢＢ（Ｆ）−Ｆ ６. ０％
３−ＨＢＢ（Ｆ）−Ｆ ６. ０％
５−ＨＢＢ（Ｆ）−Ｆ ６. ０％
２−Ｈ２ＨＢ（Ｆ）−Ｆ ６. ０％
３−Ｈ２ＨＢ（Ｆ）−Ｆ ６. ０％
５−Ｈ２ＨＢ（Ｆ）−Ｆ ６. ０％
３−ＨＨＢ−１ ８. ０％
１Ｏ１−ＨＢＢＨ−３ ２. ０％
１Ｏ１−ＨＢＢＨ−４ ２. ０％
３−ＨＥＢＥＢ−Ｆ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝１０３. ５（℃）、２０℃における粘度はη₂₀＝２５．９（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１００、２０℃における誘電率異方性はΔε＝５．０であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．６３（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９９．０％であった。
【００３９】
実施例２２
２−ＨＨＥＢＢ（Ｆ，Ｆ）−Ｆ １０．０％
５−ＨＨＥＢＢ（Ｆ，Ｆ）−Ｆ ３．０％
２−ＨＨＢ−ＯＣＦ₃ １４. ０％
３−ＨＨＢ−ＯＣＦ₃ １３. ０％
５−ＨＨＢ−ＯＣＦ₃ １２. ０％
３−ＨＨ２Ｂ−ＯＣＦ₃ ５. ０％
５−ＨＨ２Ｂ−ＯＣＦ₃ ５. ０％
３−ＨＢＢ（Ｆ）−Ｆ １６. ０％
５−ＨＢＢ（Ｆ）−Ｆ １６. ０％
３−ＨＢＢ（Ｆ）−ＯＣＦ₂ ＣＦ₂ Ｈ ４. ０％
３−ＨＢＢ（Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ２. ０％
３−ＨＨＢ（Ｆ）−Ｆ １０. ０％
５−ＨＨＢ（Ｆ）−Ｆ １０. ０％
２−ＨＢＢ（Ｆ）−Ｆ ５. ０％
３−ＨＢＢ（Ｆ）−Ｆ ５. ０％
５−ＨＢＢ（Ｆ）−Ｆ ６. ０％
２−Ｈ２ＨＢ（Ｆ）−Ｆ ６. ０％
３−Ｈ２ＨＢ（Ｆ）−Ｆ ６. ０％
５−Ｈ２ＨＢ（Ｆ）−Ｆ ６. ０％
３−ＨＨＢ−１ １０. ０％
１Ｏ１−ＨＢＢＨ−３ ２. ０％
１Ｏ１−ＨＢＢＨ−４ ２. ０％
３−ＨＥＢＥＢ−Ｆ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝１３９. ３（℃）、２０℃における粘度はη₂₀＝２７．９（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１７、２０℃における誘電率異方性はΔε＝５．８であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．６６（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．３であった。
【００４０】
実施例２３
５−ＨＨＥＢＢ（Ｆ，Ｆ）−Ｆ ５．０％
２−ＨＨＢ−ＯＣＦ₃ １０. ０％
３−ＨＨＢ−ＯＣＦ₃ １０. ０％
５−ＨＨＢ−ＯＣＦ₃ １０. ０％
３−ＨＨ２Ｂ−ＯＣＦ₃ １０. ０％
５−ＨＨ２Ｂ−ＯＣＦ₃ １０. ０％
４−Ｈ２ＢＢ（Ｆ）−Ｆ １３. ０％
５−Ｈ２ＢＢ（Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ７. ０％
３−ＨＨＢ（Ｆ，Ｆ）−Ｆ ７. ０％
３−ＨＢＢ（Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ２. ０％
３−ＨＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ２. ０％
５−ＨＢＢＨ−３ ２. ０％
５−ＨＢ（Ｆ）ＢＨ−３ ３. ０％
からなる液晶組成物の透明点はＴ_NI＝１３０. ６（℃）、２０℃における粘度はη₂₀＝２４．６（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１０、２０℃における誘電率異方性はΔε＝５．６であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．８３（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．８であった。
【００４１】
実施例２４
５−Ｈ４ＨＢ−ＯＣＦ₃ ５. ０％
４−Ｈ２ＢＢ（Ｆ）−Ｆ ５. ０％
５−Ｈ２ＢＢ（Ｆ）−Ｆ ５. ０％
３−ＨＨＢ−ＯＣＦ₃ ５. ０％
３−ＨＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ５. ０％
３−ＨＢＢ−ＯＣＦ₂ ＣＦＨＣＦ₃ ５. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １０. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＥＢ−Ｆ １５. ０％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢ−ＣＬ １０. ０％
３−ＨＨＢ−ＣＬ ５. ０％
３−ＨＨ２ＢＢ（Ｆ，Ｆ）−Ｆ ５. ０％
３−ＨＨ−４ ５. ０％
からなる液晶組成物の透明点はＴ_NI＝９９. １（℃）、２０℃における粘度はη₂₀＝２８．２（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１１９、２０℃における誘電率異方性はΔε＝８．２であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．０８（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．３％であった。
【００４２】
実施例２５
５−Ｈ４ＨＢ−ＯＣＦ₃ １２. ０％
５−Ｈ４ＨＢ（Ｆ，Ｆ）−ＣＦ₃ ８. ０％
３−Ｈ４ＨＢ（Ｆ，Ｆ）−ＣＦ₃ １４. ４％
５−Ｈ４ＨＢ（Ｆ，Ｆ）−Ｆ ５. ６％
３−ＨＢ−ＣＬ ７. ８％
５−ＨＢ−ＣＬ ３. ２％
４−Ｈ２ＢＢ（Ｆ）−Ｆ ８. ０％
５−Ｈ２ＢＢ（Ｆ）−Ｆ ７. ０％
３−ＨＨＢ−ＯＣＦ₃ ８. ０％
３−Ｈ２ＨＢ−ＯＣＦ₃ ４. ０％
３−ＨＢＢ（Ｆ，Ｆ）−ＯＣＦ₂ ＣＦＨＣＦ₃ ８. ０％
５−ＨＨＥＢ−ＯＣＦ₃ １. ６％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ５. ０％
１Ｏ１−ＨＨ−３ １. ４％
５−Ｈ２Ｂ（Ｆ）−Ｆ ２. ０％
３−ＨＨＢ−Ｏ１ ２. ０％
３−ＨＨＥＢＢ−Ｆ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝６８. ２（℃）、２０℃における粘度はη₂₀＝２４．２（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１００、２０℃における誘電率異方性はΔε＝７．３であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．１４（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．４％であった。
【００４３】
実施例２６
３−ＰｙＢ（Ｆ）−Ｆ １３. ０％
７−ＨＢ（Ｆ）−Ｆ １２. ０％
２−ＨＨＢ（Ｆ）−Ｆ １２. ０％
３−ＨＨＢ（Ｆ）−Ｆ １２. ０％
５−ＨＨＢ（Ｆ）−Ｆ １２. ０％
２−ＨＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＢＢ（Ｆ）−Ｆ ８. ０％
５−ＨＢＢ（Ｆ）−Ｆ ６. ０％
２−ＰｙＢＨ−３ ５. ０％
３−ＰｙＢＨ−３ ５. ０％
４−ＰｙＢＨ−３ ５. ０％
３−ＨＢ（２Ｆ，３Ｆ）−４ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝７８. ２（℃）、２０℃における粘度はη₂₀＝３２．２（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１３２、２０℃における誘電率異方性はΔε＝６．２であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．１２（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．０％であった。
【００４４】
実施例２７
３−ＰｙＢ（Ｆ）−Ｆ １６. ０％
３−ＨＢ−Ｏ２ １８. ０％
３−ＨＢ−Ｏ４ ５. ０％
２−ＨＨＢ（Ｆ）−Ｆ ３. ０％
３−ＨＨＢ（Ｆ）−Ｆ ４. ０％
５−ＨＨＢ（Ｆ）−Ｆ ４. ０％
２−ＨＢＢ（Ｆ）−Ｆ ４. ０％
３−ＨＢＢ（Ｆ）−Ｆ ４. ０％
５−ＨＢＢ（Ｆ）−Ｆ ４. ０％
２−ＰｙＢＢ−Ｆ ９. ０％
３−ＰｙＢＢ−Ｆ ９. ０％
４−ＰｙＢＢ−Ｆ ９. ０％
５−ＰｙＢＢ−Ｆ ９. ０％
３−ＨＨＢ（２Ｆ，３Ｆ）−４ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝８２. ２（℃）、２０℃における粘度はη₂₀＝５０．２（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１６５、２０℃における誘電率異方性はΔε＝８．５であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．２５（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．３％であった。
【００４５】
実施例２８
３−ＰｙＢ（Ｆ）−Ｆ １３. ０％
７−ＨＢ（Ｆ）−Ｆ ４. ０％
２−ＨＨＢ（Ｆ）−Ｆ １５. ０％
３−ＨＨＢ（Ｆ）−Ｆ １５. ０％
５−ＨＨＢ（Ｆ）−Ｆ １４. ０％
２−ＨＢＢ（Ｆ）−Ｆ ８. ０％
３−ＨＢＢ（Ｆ）−Ｆ ８. ０％
５−ＨＢＢ（Ｆ）−Ｆ ８. ０％
２−ＰｙＢＨ−３ ９. ０％
３−ＰｙＢＨ−３ ４. ０％
３−ＨＢＢ（２Ｆ，３Ｆ）−４ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝８６. ７（℃）、２０℃における粘度はη₂₀＝２８．７（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１０３、２０℃における誘電率異方性はΔε＝５．８であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．３２（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．７％であった。
【００４６】
実施例２９
５−ＨＢ−ＣＬ ２２. ０％
２−ＨＢＢ（Ｆ）−Ｆ １２. ０％
３−ＨＢＢ（Ｆ）−Ｆ １２. ０％
５−ＨＢＢ（Ｆ）−Ｆ １２. ０％
４−ＨＨＢ−ＣＬ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ １５. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ １５. ０％
３−ＨＢ（２Ｆ，３Ｆ）Ｈ−４ ２. ０％
からなる液晶組成物の透明点はＴ_NI＝６６. ７（℃）、２０℃における粘度はη₂₀＝２２．７（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１０５、２０℃における誘電率異方性はΔε＝５．１であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝２．３７（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．２％であった。
【００４７】
実施例３０
３−Ｈ２ＨＢ（Ｆ，Ｆ）−Ｆ ５. ０％
５−Ｈ２ＨＢ（Ｆ，Ｆ）−Ｆ ５. ０％
３−ＨＨ２Ｂ（Ｆ，Ｆ）−Ｆ ６. ０％
４−Ｈ２ＢＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２９. ０％
５−ＨＢＢ（Ｆ，Ｆ）−Ｆ ２９. ０％
３−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ３. ０％
５−ＨＢＥＢ（Ｆ，Ｆ）−Ｆ ３. ０％
３−ＨＨＥＢ（Ｆ，Ｆ）−Ｆ １０. ０％
３−ＨＢＰｎ−４ １. ０％
からなる液晶組成物の透明点はＴ_NI＝６３. ９（℃）、２０℃における粘度はη₂₀＝３５．１（ｍＰａ・ｓ）、２５℃における屈折率異方性はΔｎ＝０．１０２、２０℃における誘電率異方性はΔε＝９．６であった。この液晶組成物を６．０μｍのＯＣＢ用セルに封入し、スプレイ配向からベンド配向に転移する転移電圧電圧（Ｖ_CR）を測定したところ、Ｖ_CR＝１．６０（Ｖ）であった。また、この液晶組成物の電圧保持率を測定したが、２５℃における電圧保持率は９８．３％であった。
【００４８】
【発明の効果】
実施例で示したように、本発明によって、低電圧駆動、高コントラスト、広視野角、かつ高信頼性のアクティブ駆動ＯＣＢ素子を実現できる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an OCB mode liquid crystal display element using a nematic liquid crystal composition.
[0002]
[Prior art]
A liquid crystal cell currently used in an active matrix LCD (AM-LCD) such as a thin film transistor (TFT) that is widely used as a display method of a liquid crystal display element (LCD) is a twisted nematic (TN) cell. This active matrix (AM-LCD) system using twisted nematic (TN) cells has improved display quality compared to the conventional display system, but is still inferior in view angle and response speed compared to the CRT. ing.
Recently, in order to improve the viewing angle and response speed, an OCB (Optically Compensated Bend or Birefringence) mode has been proposed and attracted attention [SID 93 DIGEST by Y. Yamaguchi, T. Miyashita, T. Uchida, 1993: Late -News Paper; Wide-Viewing-Angle Display Mode for the Astive-Matrix Lcd Using Bend-Alignment Liquid-Crystal Cell, 277 et seq .; T.Miyashita, C.-L.Kuo, M.Suzuki, T.Uchida. SID 95 DIGEST, 1995: Properties of the OCB Mode for Active-Matrix LCDs with Wide Viewing Angle, page 797 and later].
The liquid crystal composition used in the OCB mode AM-LCD type liquid crystal display element is required to have the following characteristics in common.
(1) To obtain driving in a low voltage region, high contrast, and a wide viewing angle, K _Three / K ₁ Is small.
(2) Dielectric anisotropy (Δε) is large for driving in a low voltage region.
(3) The refractive index anisotropy (Δn) is large in order to obtain a wide viewing angle.
(4) The voltage holding ratio (VHR) is high in order to maintain high contrast.
(5) Be chemically stable.
The OCB mode is completely different from the conventional TN (twisted nematic) and STN (super twisted nematic) modes. A cell with a twist angle between the upper and lower bases of 0 °, a biaxial retardation plate, and a chiral agent are added. A nematic liquid crystal composition that has not been used is used. The driving characteristic of the OCB mode is that the liquid crystal molecules are driven in a bend alignment state in the cell.
That is, by combining a bend-aligned liquid crystal and a biaxial retardation plate, a very wide viewing angle and a very high angle compared to the conventional TN (twisted nematic) and STN (super twisted nematic) modes Contrast can be realized.
Furthermore, since the liquid crystal is driven in a bend-aligned state, it has a very fast response of about 1/20 to 1/500 compared with the conventional TN (twisted nematic) and STN (super twisted nematic) modes. Realize time.
Compared with the conventional active matrix LCD (AM-LCD) system using twisted nematic (TN) cells by driving the OCB mode with the features and advantages described above as an active matrix LCD (AM-LCD) element. Thus, a liquid crystal display element with a remarkably wide viewing angle and high-speed response can be provided.
As described above, the driving feature of the OCB mode is that the liquid crystal molecules are driven in a bend alignment state in the cell. However, since the splay alignment is performed when no voltage is applied, the transition voltage (V _CR ) It must be driven in the above voltage range. This transition voltage (V _CR If the dielectric anisotropy (Δε) of the liquid crystal composition is the same, the bend elastic constant K of the liquid crystal composition _Three And spray elastic constant K ₁ And the ratio of these two elastic constants K _Three / K ₁ Depending on the two elastic constants K _Three , K ₁ Absolute value and its ratio K _Three / K ₁ Is smaller, the transition voltage (V _CR ) Becomes smaller.
Therefore, for driving in the low voltage region in the OCB mode, this transition voltage (V _CR ) To reduce the two elastic constants K _Three , K ₁ Absolute value of K and K _Three / K ₁ Must be as small as possible.
If the refractive index anisotropy (Δn) and the dielectric anisotropy (Δε) are the same and the cell thickness is constant, the elastic constant ratio K _Three / K ₁ The smaller is, the larger is the retardation of the liquid crystal that is bend-aligned near the transition voltage. As a result, the contrast can be increased. Furthermore, since the drive voltage region can be shifted to the low voltage region as the contrast becomes higher, a wider viewing angle can be obtained.
From the above, in the OCB mode, in order to obtain driving in a low voltage region, high contrast, and a wide viewing angle, K of the liquid crystal composition _Three / K ₁ Is required to be small.
And for driving in a low voltage region, the elastic constant K of the liquid crystal composition _Three , K ₁ Absolute value and its ratio K _Three / K ₁ In addition, the dielectric anisotropy (Δε) is required to be large.
Further, in the OCB mode, the thinner the cell thickness, the wider the viewing angle. Therefore, in order to reduce the cell thickness without changing the retardation, it is required that the liquid crystal composition has a large refractive index anisotropy (Δn).
In addition, one of the advantages of the OCB mode is that the response speed is one digit or more faster than that of the TN cell. However, as the response speed is higher, the transmittance change with respect to the time change of the voltage becomes larger. Therefore, in order to maintain a high contrast, a high voltage holding ratio (VHR) is required.
Among the physical properties required for liquid crystal compositions in the OCB mode described above, K _Three / K ₁ In general, a liquid crystal composition satisfying the characteristics that the dielectric constant anisotropy (Δε) and the refractive index anisotropy (Δn) are large is likely to contain impurity ions in the liquid crystal. As a result, it is difficult to increase the voltage holding ratio (VHR). However, as described above, the OCB mode is required to have a high voltage holding ratio (VHR) in order to maintain high contrast. That is, K _Three / K ₁ It is difficult at present to satisfy both the requirement that the dielectric constant anisotropy (Δε) and the refractive index anisotropy (Δn) are large and the requirement that the voltage holding ratio be high.
[0003]
[Problems to be solved by the invention]
The present inventors have found that a liquid crystal composition satisfying these characteristics can be adjusted by the first component, the second component, and the third component, and have devised a liquid crystal display element using an OCB mode. As is apparent from the above description, an object of the present invention is to provide a liquid crystal display element using a liquid crystal composition satisfying various characteristics required for the AM-LCD display in the OCB mode.
[0004]
[Means for Solving the Invention]
The first invention of the present invention is:
a) Using a sealed cell formed of two substrates having transparent electrodes,
b) The cell contains a nematic liquid crystal mixture having a positive dielectric anisotropy and a high resistance value,
c) Two top and bottom substrate The rubbing direction of the alignment film applied on the same direction (twist angle 0 degree),
d) the pretilt direction of the liquid crystal on the alignment film; substrate The angle formed by and is arranged so that if one is + θ and the other is -θ,
e) Top and bottom of the cell substrate Upper side of substrate A biaxial retardation film is placed on top of the polarizing plate, and polarizing plates are placed above and below the cell where the biaxial retardation film is placed,
f) In an active drive OCB (Optically Compensated Bend) element that switches individual pixels of the sealed cell, the nematic liquid crystal composition contains at least a compound having the terminal group structure of the following general formula (I) as a first component: The present invention relates to a liquid crystal display element containing one or more kinds.
Embedded image

(Where X is F, Cl, CF _Three , OCF _Three , CF ₂ H, OCF ₂ H, OCF ₂ CF ₂ H, OCF ₂ Cl or OCF ₂ CFHCF _Three Q ¹ And Q ² Each independently represents H or F. )
By using a compound having a polar end group structure in the general formula (I), the dielectric anisotropy (Δε) of the liquid crystal composition can be increased. Therefore, the transition voltage (V _CR ) Can be reduced, and as a result, an active drive OCB element driven at a low voltage can be realized. Furthermore, since the terminal group in the general formula (I) is a fluorine or chlorine polar group, a high specific resistance value can be realized despite having a high dielectric anisotropy (Δε). Also excellent in thermal stability and chemical stability. Therefore, the voltage holding ratio (VHR) of the liquid crystal composition using these compounds is high. That is, an active drive OCB element that maintains a high contrast can be realized.
In the general formula (I), when the polar groups X are the same, lateral (Q ¹ And Q ² The elastic constant K is greater in the case of the compound having F than in the case where F is not present. _Three , K ₁ Has a small absolute value and a large dielectric anisotropy (Δε). Therefore, the elastic constant K can be obtained by using a compound having F in the lateral structure included in the general formula (I). _Three , K ₁ It is possible to prepare a liquid crystal composition having a small absolute value of and a large dielectric anisotropy (Δε).
As a result, an active drive OCB element driven at a low voltage can be realized. Further, as described above, the compound having lateral F contained in the formula (I) also has a high specific resistance value despite having a high dielectric anisotropy (Δε). It is possible to achieve a retention rate (V.H.R).
[0005]
According to a second invention of the present invention, the compound of the general formula (I) is represented by the general formulas (Ia), (Ib) and (Ic)
Embedded image

Embedded image

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(Wherein R ¹ Represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one of the groups or two or more methylene groups (—CH ₂ -) May be substituted by an oxygen atom or -CH = CH-. X is F, Cl, CF _Three , OCF _Three , CF ₂ H, OCF ₂ H, OCF ₂ CF ₂ H, OCF ₂ Cl or OCF ₂ CFHCF _Three Q ¹ And Q ² Each independently represents H or F, and Z ¹ , Z ² , Z ^Three , Z ^Four , Z ^Five , Z ⁶ Are each independently -CH ₂ CH ₂ -,-(CH ₂ ) _Four -, -COO-, -CF ₂ O—, —CH═CH— or a single bond, and A, B, C, D, E are each independently trans-1,4-cyclohexylene, pyrimidine-2,5-diyl, 1,4-cyclohex Senylene or H at the side position represents 1,4-phenylene which may be substituted with F. It is related with the liquid crystal display element as described in said 1st description characterized by the above-mentioned.
By combining these compounds of general formulas (Ia), (Ib) and (Ic), the dielectric anisotropy (Δε) and clearing point (NI point) of the liquid crystal composition can be arbitrarily set. Can be adjusted. Especially Z ¹ , Z ² , Z ^Three , Z ^Four , Z ^Five , Z ⁶ Bond of -COO-, -CF ₂ A compound having O- is -CH ₂ CH ₂ -, -CH = CH- or a compound having a large dielectric anisotropy (Δε) as compared with those having a single bond, and in addition, an elastic constant K in the case of a compound having a -COO- bond _Three , K ₁ The absolute value of is small. Therefore, these -COO-, -CF ₂ By using a liquid crystal composition containing a compound having O-, an active drive OCB element that can be driven at a very low voltage can be realized as a result.
Z ¹ , Z ² , Z ^Three , Z ^Four , Z ^Five , Z ⁶ -COO-, -CF ₂ Among the compounds having O-, those having lateral F have a larger dielectric anisotropy (Δε) and elastic constants K than those having no lateral F. _Three , K ₁ Since the absolute value of is even smaller, it is possible to realize an active drive OCB element that can be driven at a lower voltage.
In addition, since the compounds represented by the general formulas (Ia), (Ib) and (Ic) have a fluorine-based or chlorine-based polar group, a liquid crystal composition using them has a high ratio. It exhibits resistance and is excellent in thermal stability and chemical stability. Accordingly, the voltage holding ratio (VHR) of the liquid crystal composition can be increased. That is, an active drive OCB element that maintains a high contrast can be realized.
Of the general formulas (Ia), (Ib) and (Ic), the compound having pyrimidine-2,5-diyl has an elastic constant ratio K _Three / K ₁ Is as small as 1.3 or less, and the refractive index anisotropy (Δn) is as large as Δn ≦ 0.2. Therefore, by using these compounds having pyrimidine-2,5-diyl, the elastic constant ratio of the liquid crystal composition is K. _Three / K ₁ Since the refractive index anisotropy (Δn) can be adjusted to be particularly large, an active drive OCB element having a low voltage drive, a high contrast, and a wide viewing angle can be realized.
[0006]
According to a third aspect of the present invention, the amount of the first component used is 50 to 100% by weight based on the total weight of the liquid crystal composition. It relates to the liquid crystal display element described.
[0007]
The fourth invention of the present invention is the general formula (II), (III) and (IV) as the second component
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(Wherein R ² And R ^Three Each independently represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one of the groups or two or more methylene groups (-CH ₂ -) May be substituted by an oxygen atom (-O-) or -CH = CH-. G and J each independently represents trans-1,4-cyclohexylene, 1,4-phenylene or pyrimidine-2,5-diyl; ⁷ Is -CH ₂ CH ₂ -, -COO-, -CH = CH-, -C≡C-, or a single bond. )
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(Wherein R ^Four And R ^Five Each independently represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group. In any case, any one of the groups or two or more methylene groups (-CH ₂ -) May be substituted by an oxygen atom (-O-) or -CH = CH-. K represents trans-1,4-cyclohexylene, 1,4-phenylene or pyrimidine-2,5-diyl, and L and M each independently represent trans-1,4-cyclohexylene or a lateral 1 1 represents 1,4-phenylene optionally substituted with F. Z ⁸ And Z ⁹ Each independently represents —CH ₂ CH ₂ -, -CH = CH-, -C≡C-, -COO-, or a single bond. )
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(Wherein R ⁶ And R ⁷ Each independently represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one of the groups or two or more methylene groups (-CH ₂ -) May be substituted by an oxygen atom (-O-) or -CH = CH-. Q ^Three Represents H or F. The liquid crystal display device according to any one of the first to third inventions, further comprising at least one selected from the group of compounds represented by
Since the compounds of the second component represented by the general formulas (II), (III) and (IV) do not have a highly polar substituent, impurity ions cannot exist stably in these compounds. Therefore, the specific resistance value of these second component compounds is very high, and the thermal stability and chemical stability are also very excellent. Therefore, by combining the second component and the first component, the dielectric anisotropy (Δε) is large and the elastic constant K _Three , K ₁ Absolute value and elastic constant ratio K _Three / K ₁ , A voltage holding ratio (VHR) is very high, and a liquid crystal composition excellent in thermal stability and chemical stability can be prepared. Therefore, it is possible to realize an active drive OCB element that maintains low voltage drive, high contrast, wide viewing angle, and high reliability.
In addition, in general formulas (II), (III) and (IV), a compound containing 4-4′-biphenylene as a skeleton, and a skeleton in which 1,4-phenylene and pyrimidine-2,5-diyl are bonded. Compound, compound containing a skeleton having —CH═CH— between two benzene rings in 4-4′-biphenylene, —C≡C— between two benzene rings in 4-4′-biphenylene And a compound containing any two or more of these skeletons (arbitrary H in 1,4-phenylene contained in the skeleton of these compounds may be substituted with F). The rate anisotropy (Δn) is very large as Δn ≦ 0.2. Therefore, since the refractive index anisotropy (Δn) of the liquid crystal composition can be increased by using a compound containing these skeletons, an active drive OCB element having a high contrast and a wide viewing angle can be realized.
In the general formulas (II), (III) and (IV), a compound containing pyrimidine-2,5-diyl in its skeleton has an elastic constant K _Three , K ₁ The absolute value of is small and the elastic constant ratio K _Three / K ₁ <1.3, very small. Therefore, by using a compound containing pyrimidine-2,5-diyl in the skeleton, K of the liquid crystal composition can be obtained. _Three , K ₁ Absolute value and elastic constant ratio K _Three / K ₁ Therefore, an active drive OCB element with low voltage drive, high contrast, and wide viewing angle can be realized.
Further, the compounds represented by the general formulas (III) and (IV) have a clearing point (NI point) as high as NI ≧ 100 ° C. and a refractive index anisotropy (Δn) as large as Δn ≧ 0.1. By combining with the first component, dielectric anisotropy (Δε), elastic constant K _Three , K ₁ Absolute value and elastic constant ratio K _Three / K ₁ Is small, the refractive index anisotropy (Δn) is large, the clearing point (NI point) is high, the voltage holding ratio (VHR) is very large, and the thermal stability and chemical stability are improved. An excellent liquid crystal composition can be prepared. Therefore, it is possible to realize an active drive OCB element with low voltage drive, high contrast, wide viewing angle, high reliability, and a wide driving temperature range.
[0008]
According to a fifth aspect of the present invention, there is provided the liquid crystal display element according to the fourth aspect, wherein the amount of the second component used is 40% by weight or less based on the total weight of the liquid crystal composition.
[0009]
In the sixth aspect of the present invention, the third component is represented by the general formulas (VI-a), (VI-b), (VI-c), (VI-d), (VI-e).
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(Wherein R ⁸ Represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one of the groups or two or more methylene groups (—CH ₂ -) May be substituted by an oxygen atom (-O-) or -CH = CH-. R ⁹ Is an alkyl group having 1 to 10 carbon atoms, a fluoroalkyl group, or CF _Three , CF ₂ H, and one or more methylene groups (—CH ₂ -) May be substituted by an oxygen atom (-O-) or -CH = CH-. Z ^Ten And Z ¹¹ Are each independently -CH ₂ CH ₂ -, -COO- or a single bond is shown. The liquid crystal display device according to the fourth or fifth invention, further comprising one or more compounds selected from the group of compounds represented by
[0010]
The seventh invention of the present invention relates to the liquid crystal display element according to the sixth invention, wherein the amount of the third component used is 20% by weight or less based on the total weight of the liquid crystal composition.
[0011]
The eighth aspect of the present invention is that the nematic phase range of the liquid crystal composition is 60 ° C. or higher, the optical anisotropy Δn is 0.1 or higher, and the elastic constant ratio K between the spray mode and the bend mode. _Three / K ₁ The liquid crystal display element according to any one of the first to seventh inventions, characterized in that is 1.7 or less and a dielectric anisotropy Δε is 5.0 or more.
[0012]
The ninth, tenth and eleventh aspects of the present invention relate to a liquid crystal composition having the composition defined in any of the first to fourth or sixth aspects.
[0013]
The amount of the first component of the liquid crystal composition used in the active drive OCB device in the present invention is preferably 50 to 100% by weight with respect to the total weight of the liquid crystal composition. Transition voltage (V) for transition from splay alignment to bend alignment at 50% by weight or less _CR ) Is not practically preferable.
The amount of the second component used is preferably 40% by weight or less based on the total weight of the liquid crystal composition. When the content exceeds 40% by weight, the transition voltage (V _CR ) Is undesirably high. More preferably, it is 30% by weight or less.
[0014]
The liquid crystal composition used in the present invention has a threshold voltage, a nematic range, Δn, in addition to the compounds represented by the general formulas (I) to (VI), depending on the purpose of the active drive OCB device used. For the purpose of adjusting dielectric anisotropy, viscosity, etc., other compounds can be contained in an appropriate amount within a range that does not impair the object of the present invention.
[0015]
The liquid crystal composition used according to the invention is prepared in a manner customary per se. In general, a method is used in which various components are dissolved together at a high temperature.
[0016]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples. The composition ratios of the comparative examples and the examples are all shown in wt%. Although the measured value of the voltage holding ratio is described, this measurement was performed based on the area method. Moreover, the description method of each compound follows Table 1.
[0017]
[Table 1]

[0018]
Example 1
3-HB-CL 7.0%
2-HHB-CL 5.0%
4-HHB-CL 10.0%
5-HHB-CL 4.0%
2-HHB (F) -F 4.0%
3-HHB (F) -F 4.0%
5-HHB (F) -F 4.0%
2-HBB (F) -F 10.0%
3-HBB (F) -F 10.0%
5-HBB (F) -F 10.0%
3-HBB (F, F) -F 16.0%
5-HBB (F, F) -F 16.0%
The clearing point of the liquid crystal composition comprising _NI = 90.4 (° C), viscosity at 20 ° C is η ₂₀ = 24.2 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.119, dielectric anisotropy at 20 ° C. is Δε = 6.8, elastic constant K at 25 ° C. _Three Is 14.8 (PN), K ₁ Is 8.98 (PN), elastic constant ratio K _Three / K ₁ Was 1.65. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 2.21 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 99.3%.
[0019]
Example 2
3-PyB (F) -F 12.0%
7-HB (F) -F 11.0%
2-HHB (F) -F 9.0%
3-HHB (F) -F 8.0%
5-HHB (F) -F 8.0%
2-HBB (F) -F 8.0%
3-HBB (F) -F 8.0%
5-HBB (F) -F 7.0%
3-HHEB-F 5.0%
5-HHEB-F 5.0%
3-HBEB-F 6.0%
3-PyBB-F 7.0%
4-PyBB-F 6.0%
The clearing point of the liquid crystal composition comprising _NI = 80.7 (° C), viscosity at 20 ° C is η ₂₀ = 26.9 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.122, dielectric anisotropy at 20 ° C. is Δε = 8.6, elastic constant K at 25 ° C. _Three Is 11.8 (PN), K ₁ Is 9.84 (PN), elastic constant ratio K _Three / K ₁ Was 1.20. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.82 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.5%.
[0020]
Example 3
3-H2BB (F, F) -F 10.0%
5-H2BB (F, F) -F 10.0%
3-HH2B (F, F) -F 6.0%
3-HBB (F, F) -F 29.0%
5-HBB (F, F) -F 29.0%
3-HBEB (F, F) -F 3.0%
5-HBEB (F, F) -F 3.0%
3-HHEB (F, F) -F 10.0%
The clearing point of the liquid crystal composition comprising _NI = 61.5 (° C), viscosity at 20 ° C is η ₂₀ = 34.0 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.114, dielectric anisotropy at 20 ° C. is Δε = 10.3, elastic constant ratio K at 25 ° C. _Three / K ₁ Was 1.62. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.55 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.9%.
[0021]
Example 4
3-H2HB (F, F) -F 5.0%
5-H2HB (F, F) -F 5.0%
3-HH2B (F, F) -F 6.0%
4-H2BB (F, F) -F 10.0%
3-HBB (F, F) -F 29.0%
5-HBB (F, F) -F 29.0%
3-HBEB (F, F) -F 3.0%
5-HBEB (F, F) -F 3.0%
3-HHEB (F, F) -F 10.0%
The clearing point of the liquid crystal composition comprising _NI = 63.2 (° C), viscosity at 20 ° C is η ₂₀ = 34.3 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.108, dielectric anisotropy at 20 ° C. is Δε = 10.0, elastic constant ratio K at 25 ° C. _Three / K ₁ Was 1.65. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.63 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.6%.
[0022]
Example 5
3-H2HB (F, F) -F 5.0%
5-H2HB (F, F) -F 5.0%
3-HH2B (F, F) -F 9.0%
5-HH2B (F, F) -F 9.0%
3-HBB (F, F) -F 26.0%
5-HBB (F, F) -F 26.0%
3-HHEB (F, F) -F 10.0%
3-HBEB (F, F) -F 2.0%
5-HBEB (F, F) -F 2.0%
3-HHBB (F, F) -F 4.0%
3-HH2BB (F, F) -F 2.0%
The clearing point of the liquid crystal composition comprising _NI = 83.8 (° C), viscosity at 20 ° C is η ₂₀ = 31.9 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.110, dielectric anisotropy at 20 ° C. is Δε = 10.5, elastic constant ratio K at 25 ° C. _Three / K ₁ Was 1.69. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.70 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 99.0%.
[0023]
Example 6
3-HHB (F, F) -F 8.0%
3-HH2B (F, F) -F 10.0%
5-HH2B (F, F) -F 10.0%
3-HBB (F, F) -F 26.0%
5-HBB (F, F) -F 26.0%
3-HHEB (F, F) -F 10.0%
3-HBEB (F, F) -F 2.0%
5-HBEB (F, F) -F 2.0%
3-HHBB (F, F) -F 6.0%
The clearing point of the liquid crystal composition comprising _NI = 82.2 (° C), viscosity at 20 ° C is η ₂₀ = 32.3 (mPa · s), refractive index anisotropy at 25 ° C. was Δn = 0.110, and dielectric anisotropy at 20 ° C. was Δε = 10.6. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.69 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 99.2%.
[0024]
Example 7
2-HHEBB (F, F) -F 7.0%
5-HHEBB (F, F) -F 3.0%
5-HB-F 3.0%
7-HB-F 4.0%
2-HHB-OCF _Three 12.0%
3-HHB-OCF _Three 12.0%
5-HHB-OCF _Three 10.0%
2-H2HB-OCF _Three 6.0%
3-H2HB-OCF _Three 6.0%
4-H2BB (F) -F 15.0%
5-H2BB (F) -F 14.0%
3-HBB (F, F) -OCF ₂ CFHCF _Three 4.0%
3-H2BB (F, F) -OCF ₂ CFHCF _Three 2.0%
3-HBB-OCF ₂ CFHCF _Three 2.0%
The clearing point of the liquid crystal composition comprising _NI = 110.5 (° C), viscosity at 20 ° C is η ₂₀ = 22.5 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.106, and the dielectric anisotropy at 20 ° C. was Δε = 5.4. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 2.65 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.5%.
[0025]
Example 8
5-H4HB-OCF _Three 7.0%
4-H2BB (F) -F 8.0%
5-H2BB (F) -F 7.0%
3-HBB-OCF ₂ CFHCF _Three 7.0%
3-HBB (F, F) -OCF ₂ CFHCF _Three 7.0%
5-BB-OCF ₂ H 4.0%
3-HEB-OCF _Three 3.0%
5-HHEB-OCF _Three 7.0%
2-HHB (F) -F 5.0%
3-HHB (F) -F 5.0%
5-HHB (F) -F 4.0%
3-HHEB (F, F) -F 7.0%
5-H2B (F) -F 10.0%
7-HB (F, F) -F 9.0%
3-HBEB-F 10.0%
The clearing point of the liquid crystal composition comprising _NI = 72.7 (° C), viscosity at 20 ° C is η ₂₀ = 22.3 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.101, and the dielectric anisotropy at 20 ° C. was Δε = 5.5. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 2.12 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.2%.
[0026]
Example 9
5-H4HB-OCF _Three 8.0%
4-H2BB (F) -F 9.0%
5-H2BB (F) -F 8.0%
3-HBB (F, F) -OCF ₂ CFHCF _Three 8.0%
3-HBB (F) -OCF ₂ CF ₂ H 8.0%
3-HHB-OCF _Three 8.0%
3-HHB (F, F) -F 8.0%
3-HBB (F, F) -F 12.0%
5-HB-CL 8.0%
5-HHB-CL 4.0%
3-HB-CL 9.0%
5-H2B (F) -F 10.0%
The clearing point of the liquid crystal composition comprising _NI = 62.2 (° C), viscosity at 20 ° C is η ₂₀ = 18.2 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.100, and the dielectric anisotropy at 20 ° C. was Δε = 5.2. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 2.14 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.4%.
[0027]
Example 10
5-H4HB-OCF _Three 8.0%
4-H2BB (F) -F 9.0%
5-H2BB (F) -F 8.0%
3-HH2B-OCF _Three 4.0%
3-H2HB-OCF _Three 4.0%
3-HBB (F, F) -OCF ₂ CFHCF _Three 8.0%
3-HBB (2F) -OCF ₂ CFHCF _Three 4.0%
3-HBB (F, F) -F 12.0%
5-HHEB-OCF _Three 3.0%
3-HHEB (F, F) -F 8.0%
5-HB-CL 7.0%
5-HHB-CL 5.0%
5-H2B (F) -F 10.0%
2-HEB-F 10.0%
The clearing point of the liquid crystal composition comprising _NI = 60.6 (° C), viscosity at 20 ° C is η ₂₀ = 20.0 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.105, and the dielectric anisotropy at 20 ° C. was Δε = 5.6. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.97 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.3%.
[0028]
Example 11
3-PyB (F) -F 12.0%
7-HB (F) -F 11.0%
2-HHB (F) -F 7.0%
3-HHB (F) -F 7.0%
5-HHB (F) -F 7.0%
V-HHB (F) -F 2.0%
V2-HHB (F) -F 2.0%
2-HBB (F) -F 8.0%
3-HBB (F) -F 8.0%
5-HBB (F) -F 7.0%
3-HHEB-F 5.0%
5-HHEB-F 5.0%
3-HBEB-F 6.0%
3-PyBB-F 7.0%
4-PyBB-F 6.0%
The clearing point of the liquid crystal composition comprising _NI = 81.0 (° C), viscosity at 20 ° C is η ₂₀ = 26.8 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.128, dielectric anisotropy at 20 ° C. is Δε = 8.7, elastic constant K at 25 ° C. _Three Is 12.2 (PN), K ₁ Is 9.88 (PN), elastic constant ratio K _Three / K ₁ Was 1.23. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.87 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.1%.
[0029]
Example 12
V-HHB (F, F) -F 3.0%
3-HHB (F, F) -F 5.0%
3-HH2B (F, F) -F 10.0%
5-HH2B (F, F) -F 10.0%
3-HBB (F, F) -F 26.0%
5-HBB (F, F) -F 26.0%
3-HHEB (F, F) -F 10.0%
3-HBEB (F, F) -F 2.0%
5-HBEB (F, F) -F 2.0%
3-HHBB (F, F) -F 6.0%
The clearing point of the liquid crystal composition comprising _NI = 82.5 (° C), viscosity at 20 ° C is η ₂₀ = 32.0 (mPa · s), refractive index anisotropy at 25 ° C. was Δn = 0.113, and dielectric anisotropy at 20 ° C. was Δε = 10.6. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.72 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.7%.
[0030]
Example 13
7-HB (F, F) -F 3.0%
2-HHB (F) -F 2.0%
3-HHB (F) -F 3.0%
5-HHB (F) -F 3.0%
2-HBB (F) -F 9.0%
3-HBB (F) -F 9.0%
5-HBB (F) -F 8.0%
3-HBB-F 4.0%
5-HBB-F 3.0%
3-HBB (F, F) -F 15.0%
5-HBB (F, F) -F 15.0%
3-HB-O2 7.0%
3-HH-4 4.0%
3-HB (F) TB-2 5.0%
3-HB (F) TB-3 5.0%
3-HB (F) TB-4 5.0%
The clearing point of the liquid crystal composition comprising _NI = 92.1 (° C), viscosity at 20 ° C is η ₂₀ = 27.6 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.140, dielectric anisotropy at 20 ° C. is Δε = 5.5, elastic constant K at 25 ° C. _Three Is 12.9 (PN), K ₁ Is 10.9 (PN), elastic constant ratio K _Three / K ₁ Was 1.18. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 2.30 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 99.0%.
[0031]
Example 14
3-PyB (F) -F 16.0%
7-HB (F) -F 12.0%
2-HHB (F) -F 12.0%
3-HHB (F) -F 12.0%
5-HHB (F) -F 12.0%
3-PyBB-F 8.0%
4-PyBB-F 8.0%
5-PyBB-F 8.0%
2-PyB-2 2.0%
2-PyBH-3 3.0%
3-PyBH-3 3.0%
4-PyBH-3 4.0%
The clearing point of the liquid crystal composition comprising _NI = 83.8 (° C), viscosity at 20 ° C is η ₂₀ = 50.9 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.140, dielectric anisotropy at 20 ° C. is Δε = 9.0, elastic constant K at 25 ° C. _Three Is 15.3 (PN), K ₁ Is 16.6 (PN), elastic constant ratio K _Three / K ₁ Was 0.92. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 2.15 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.3%.
[0032]
Example 15
3-PyB (F) -F 11.0%
5-PyB (F) -F 12.0%
3-HHEB-F 5.0%
5-HHEB-F 5.0%
3-HBEB-F 6.0%
3-PyBB-F 8.0%
4-PyBB-F 8.0%
5-PyBB-F 8.0%
3-HB-O2 20.0%
3-HEB-O4 1.4%
4-HEB-O2 1.0%
5-HEB-O1 1.0%
3-HEB-O2 0.9%
5-HEB-O2 0.7%
2-PyBH-3 4.0%
3-PyBH-3 4.0%
4-PyBH-3 4.0%
The clearing point of the liquid crystal composition comprising _NI = 81.2 (° C), viscosity at 20 ° C is η ₂₀ = 27.8 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.159, dielectric anisotropy at 20 ° C. is Δε = 7.9, elastic constant K at 25 ° C. _Three Is 14.0 (PN), K ₁ Is 14.0 (PN), elastic constant ratio K _Three / K ₁ Was 1.00. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 1.98 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.1%.
[0033]
Example 16
2-PyB-F 2.0%
3-PyB (F) -F 10.0%
5-PyB (F) -F 11.0%
3-HHEB-F 5.0%
5-HHEB-F 5.0%
3-HBEB-F 6.0%
3-PyBB-F 8.0%
4-PyBB-F 8.0%
5-PyBB-F 6.0%
3-PyB-O1 2.0%
3-HB-O2 20.0%
3-HEB-O4 2.0%
5-HEB-1 2.0%
1O-BEB-2 1.0%
2-PyBH-3 4.0%
3-PyBH-3 4.0%
4-PyBH-3 2.0%
3-PyBB-2 2.0%
The clearing point of the liquid crystal composition comprising _NI = 80.0 (° C), viscosity at 20 ° C is η ₂₀ = 28.7 (mPa · s), refractive index anisotropy at 25 ° C is Δn = 0.1700, dielectric anisotropy at 20 ° C is Δε = 7.0, elastic constant K at 25 ° C _Three Is 13.8 (PN), K ₁ Is 13.7 (PN), elastic constant ratio K _Three / K ₁ Was 1.01. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.08 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.1%.
[0034]
Example 17
7-HB (F) -F 8.0%
7-HB (F, F) -F 10.0%
2-HBB (F) -F 13.0%
3-HBB (F) -F 13.0%
5-HBB (F) -F 12.0%
3-HB (F) TB-2 6.0%
3-HB (F) TB-3 6.0%
3-HB (F) TB-4 6.0%
3-H2BTB-2 4.0%
3-H2BTB-3 4.0%
3-HBB (F, F) -F 9.0%
5-HBB (F, F) -F 9.0%
The clearing point of the liquid crystal composition comprising _NI = 83.4 (° C), viscosity at 20 ° C is η ₂₀ = 30.8 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.146, dielectric anisotropy at 20 ° C. is Δε = 6.2, elastic constant K at 25 ° C. _Three Is 10.9 (PN), K ₁ Is 10.4 (PN), elastic constant ratio K _Three / K ₁ Was 1.05. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.18 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 99.0%.
[0035]
Example 18
7-HB (F, F) -F 7.0%
2-BTB-O1 11.0%
3-HB-O2 3.0%
2-HBB (F) -F 12.0%
3-HBB (F) -F 11.0%
5-HBB (F) -F 10.0%
3-HBB (F, F) -F 10.0%
5-HBB (F, F) -F 11.0%
3-H2BTB-2 3.0%
3-H2BTB-3 4.0%
3-HB (F) TB-2 6.0%
3-HB (F) TB-3 6.0%
3-HB (F) TB-4 6.0%
The clearing point of the liquid crystal composition comprising _NI = 96.1 (° C), viscosity at 20 ° C is η ₂₀ = 35.9 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.179, and the dielectric anisotropy at 20 ° C. was Δε = 5.5. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.52 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.7%.
[0036]
Example 19
7-HB (F, F) -F 3.0%
2-HHB (F) -F 2.0%
3-HHB (F) -F 3.0%
5-HHB (F) -F 3.0%
2-HBB (F) -F 9.0%
3-HBB (F) -F 9.0%
5-HBB (F) -F 8.0%
3-HBB-F 3.0%
5-HBB-F 3.0%
3-HBB (F, F) -F 15.0%
5-HBB (F, F) -F 15.0%
3-HB-O2 7.0%
3-HH-4 4.0%
3-HB (F) TB-2 5.0%
3-HB (F) TB-3 5.0%
3-HB (F) TB-4 4.0%
2-BTB-1 1.0%
3-HHB-F 1.0%
The clearing point of the liquid crystal composition comprising _NI = 91.3 (° C), viscosity at 20 ° C is η ₂₀ = 27.0 (mPa · s), refractive index anisotropy at 25 ° C. is Δn = 0.146, dielectric anisotropy at 20 ° C. is Δε = 5.3, elastic constant K at 25 ° C. _Three Is 12.0 (PN), K ₁ Is 10.1 (PN), elastic constant ratio K _Three / K ₁ Was 1.19. This liquid crystal composition is sealed in an OCB cell having a thickness of 6.0 μm, and a transition voltage (V _CR ) Measured, V _CR = 2.27 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.8%.
[0037]
Example 20
2-HHEBB (F, F) -F 5.0%
3-HB-CL 5.0%
2-HHB (F) -F 10.0%
3-HHB (F) -F 10.0%
5-HHB (F) -F 10.0%
2-HBB (F) -F 10.0%
3-HBB (F) -F 10.0%
5-HBB (F) -F 10.0%
2-HBB-F 5.0%
3-HBB-F 5.0%
3-HBB (F, F) -F 8.0%
3-HHBB (F, F) -F 3.0%
3-HB (F) VB-2 5.0%
3-HB (F) VB-3 4.0%
The clearing point of the liquid crystal composition comprising _NI = 115.0 (° C), viscosity at 20 ° C is η ₂₀ = 27.7 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.134, and the dielectric anisotropy at 20 ° C. was Δε = 5.7. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.51 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 99.4%.
[0038]
Example 21
5-HHEBB (F, F) -F 5.0%
5-H2B (F) -F 10.0%
7-HB (F) -F 3.0%
7-HEB-F 2.0%
2-HHB (F) -F 10.0%
3-HHB (F) -F 10.0%
5-HHB (F) -F 10.0%
2-HBB (F) -F 6.0%
3-HBB (F) -F 6.0%
5-HBB (F) -F 6.0%
2-H2HB (F) -F 6.0%
3-H2HB (F) -F 6.0%
5-H2HB (F) -F 6.0%
3-HHB-1 8.0%
1O1-HBBH-3 2.0%
1O1-HBBH-4 2.0%
3-HEBEB-F 2.0%
The clearing point of the liquid crystal composition comprising _NI = 103.5 (° C), viscosity at 20 ° C is η ₂₀ = 25.9 (mPa · s), refractive index anisotropy at 25 ° C. was Δn = 0.100, and dielectric anisotropy at 20 ° C. was Δε = 5.0. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.63 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 99.0%.
[0039]
Example 22
2-HHEBB (F, F) -F 10.0%
5-HHEBB (F, F) -F 3.0%
2-HHB-OCF _Three 14.0%
3-HHB-OCF _Three 13.0%
5-HHB-OCF _Three 12.0%
3-HH2B-OCF _Three 5.0%
5-HH2B-OCF _Three 5.0%
3-HBB (F) -F 16.0%
5-HBB (F) -F 16.0%
3-HBB (F) -OCF ₂ CF ₂ H 4.0%
3-HBB (F) -OCF ₂ CFHCF _Three 2.0%
3-HHB (F) -F 10.0%
5-HHB (F) -F 10.0%
2-HBB (F) -F 5.0%
3-HBB (F) -F 5.0%
5-HBB (F) -F 6.0%
2-H2HB (F) -F 6.0%
3-H2HB (F) -F 6.0%
5-H2HB (F) -F 6.0%
3-HHB-1 10.0%
1O1-HBBH-3 2.0%
1O1-HBBH-4 2.0%
3-HEBEB-F 2.0%
The clearing point of the liquid crystal composition comprising _NI = 139.3 (° C), viscosity at 20 ° C is η ₂₀ = 27.9 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.117, and the dielectric anisotropy at 20 ° C. was Δε = 5.8. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.66 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.3.
[0040]
Example 23
5-HHEBB (F, F) -F 5.0%
2-HHB-OCF _Three 10.0%
3-HHB-OCF _Three 10.0%
5-HHB-OCF _Three 10.0%
3-HH2B-OCF _Three 10.0%
5-HH2B-OCF _Three 10.0%
4-H2BB (F) -F 13.0%
5-H2BB (F) -F 10.0%
3-HBB (F, F) -F 7.0%
3-HHB (F, F) -F 7.0%
3-HBB (F) -OCF ₂ CFHCF _Three 2.0%
3-HBB (F, F) -OCF ₂ CFHCF _Three 2.0%
5-HBBH-3 2.0%
5-HB (F) BH-3 3.0%
The clearing point of the liquid crystal composition comprising _NI = 130.6 (° C), viscosity at 20 ° C is η ₂₀ = 24.6 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.110, and the dielectric anisotropy at 20 ° C. was Δε = 5.6. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.83 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.8.
[0041]
Example 24
5-H4HB-OCF _Three 5.0%
4-H2BB (F) -F 5.0%
5-H2BB (F) -F 5.0%
3-HHB-OCF _Three 5.0%
3-HBB (F, F) -OCF ₂ CFHCF _Three 5.0%
3-HBB-OCF ₂ CFHCF _Three 5.0%
3-HBB (F, F) -F 10.0%
5-HBB (F, F) -F 10.0%
3-HBEB-F 15.0%
3-HBEB (F, F) -F 10.0%
3-HB-CL 10.0%
3-HHB-CL 5.0%
3-HH2BB (F, F) -F 5.0%
3-HH-4 5.0%
The clearing point of the liquid crystal composition comprising _NI = 99.1 (° C), viscosity at 20 ° C is η ₂₀ = 28.2 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.119, and the dielectric anisotropy at 20 ° C. was Δε = 8.2. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.08 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.3%.
[0042]
Example 25
5-H4HB-OCF _Three 12.0%
5-H4HB (F, F) -CF _Three 8.0%
3-H4HB (F, F) -CF _Three 14. 4%
5-H4HB (F, F) -F 5.6%
3-HB-CL 7.8%
5-HB-CL 3.2%
4-H2BB (F) -F 8.0%
5-H2BB (F) -F 7.0%
3-HHB-OCF _Three 8.0%
3-H2HB-OCF _Three 4.0%
3-HBB (F, F) -OCF ₂ CFHCF _Three 8.0%
5-HHEB-OCF _Three 1.6%
3-HBEB (F, F) -F 5.0%
1O1-HH-3 1.4%
5-H2B (F) -F 2.0%
3-HHB-O1 2.0%
3-HHEBB-F 2.0%
The clearing point of the liquid crystal composition comprising _NI = 68.2 (° C), viscosity at 20 ° C is η ₂₀ = 24.2 (mPa · s), refractive index anisotropy at 25 ° C. was Δn = 0.100, and dielectric anisotropy at 20 ° C. was Δε = 7.3. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.14 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.4%.
[0043]
Example 26
3-PyB (F) -F 13.0%
7-HB (F) -F 12.0%
2-HHB (F) -F 12.0%
3-HHB (F) -F 12.0%
5-HHB (F) -F 12.0%
2-HBB (F) -F 8.0%
3-HBB (F) -F 8.0%
5-HBB (F) -F 6.0%
2-PyBH-3 5.0%
3-PyBH-3 5.0%
4-PyBH-3 5.0%
3-HB (2F, 3F) -4 2.0%
The clearing point of the liquid crystal composition comprising _NI = 78.2 (° C), viscosity at 20 ° C is η ₂₀ = 32.2 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.132, and the dielectric anisotropy at 20 ° C. was Δε = 6.2. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.12 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.0%.
[0044]
Example 27
3-PyB (F) -F 16.0%
3-HB-O2 18.0%
3-HB-O4 5.0%
2-HHB (F) -F 3.0%
3-HHB (F) -F 4.0%
5-HHB (F) -F 4.0%
2-HBB (F) -F 4.0%
3-HBB (F) -F 4.0%
5-HBB (F) -F 4.0%
2-PyBB-F 9.0%
3-PyBB-F 9.0%
4-PyBB-F 9.0%
5-PyBB-F 9.0%
3-HHB (2F, 3F) -4 2.0%
The clearing point of the liquid crystal composition comprising _NI = 82.2 (° C), viscosity at 20 ° C is η ₂₀ = 50.2 (mPa · s), the refractive index anisotropy at 25 ° C was Δn = 0.165, and the dielectric anisotropy at 20 ° C was Δε = 8.5. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.25 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.3%.
[0045]
Example 28
3-PyB (F) -F 13.0%
7-HB (F) -F 4.0%
2-HHB (F) -F 15.0%
3-HHB (F) -F 15.0%
5-HHB (F) -F 14.0%
2-HBB (F) -F 8.0%
3-HBB (F) -F 8.0%
5-HBB (F) -F 8.0%
2-PyBH-3 9.0%
3-PyBH-3 4.0%
3-HBB (2F, 3F) -4 2.0%
The clearing point of the liquid crystal composition comprising _NI = 86.7 (° C), viscosity at 20 ° C is η ₂₀ = 28.7 (mPa · s), the refractive index anisotropy at 25 ° C was Δn = 0.103, and the dielectric anisotropy at 20 ° C was Δε = 5.8. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.32 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.7%.
[0046]
Example 29
5-HB-CL 22.0%
2-HBB (F) -F 12.0%
3-HBB (F) -F 12.0%
5-HBB (F) -F 12.0%
4-HHB-CL 10.0%
3-HBB (F, F) -F 15.0%
5-HBB (F, F) -F 15.0%
3-HB (2F, 3F) H-4 2.0%
The clearing point of the liquid crystal composition comprising _NI = 66.7 (° C), the viscosity at 20 ° C is η ₂₀ = 22.7 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.105, and the dielectric anisotropy at 20 ° C. was Δε = 5.1. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 2.37 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.2%.
[0047]
Example 30
3-H2HB (F, F) -F 5.0%
5-H2HB (F, F) -F 5.0%
3-HH2B (F, F) -F 6.0%
4-H2BB (F, F) -F 10.0%
3-HBB (F, F) -F 29.0%
5-HBB (F, F) -F 29.0%
3-HBEB (F, F) -F 3.0%
5-HBEB (F, F) -F 3.0%
3-HHEB (F, F) -F 10.0%
3-HBPn-4 1.0%
The clearing point of the liquid crystal composition comprising _NI = 63.9 (° C), viscosity at 20 ° C is η ₂₀ = 35.1 (mPa · s), the refractive index anisotropy at 25 ° C. was Δn = 0.102, and the dielectric anisotropy at 20 ° C. was Δε = 9.6. This liquid crystal composition is sealed in a 6.0 μm OCB cell, and a transition voltage voltage (V _CR ) Measured, V _CR = 1.60 (V). Further, the voltage holding ratio of this liquid crystal composition was measured, and the voltage holding ratio at 25 ° C. was 98.3%.
[0048]
【The invention's effect】
As shown in the embodiments, according to the present invention, an active drive OCB element with low voltage drive, high contrast, wide viewing angle, and high reliability can be realized.

Claims (12)

a) Using a sealed cell formed of two substrates having transparent electrodes,
b) The cell contains a nematic liquid crystal mixture having a positive dielectric anisotropy and a high resistance value,
c) The rubbing directions of the alignment films applied on the two upper and lower substrates are the same direction (twist angle 0 degree),
d) When the angle between the pretilt direction of the liquid crystal on the alignment film and the substrate is + θ, the other is −θ,
e) A biaxial retardation film is disposed on the upper substrate of the upper and lower substrates of the cell, and polarizing plates are disposed above and below the cell where the biaxial retardation film is disposed,
f) In an actively driven OCB (Optically Compensated Bend or Birefringence) element that switches the individual pixels of this sealed cell,
A liquid crystal display device, wherein the nematic liquid crystal composition contains at least one compound represented by the following general formulas ( I- a), ( I- b) and ( I- c) as a first component .

(Wherein R ¹ represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one or two or more methylene groups (—CH ₂ —) not adjacent to each other in the group are oxygen atoms or — X may represent F, Cl, CF ₃ , OCF ₃ , CF ₂ H, OCF ₂ H, OCF ₂ CF ₂ H, OCF ₂ Cl, or OCF ₂ CFHCF ₃ ; ¹ and Q ² represent F , and Z ¹ , Z ² , Z ³ , Z ⁴ , Z ⁵ , and Z ⁶ are each independently —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —COO—. , —CF ₂ O—, —CH═CH—, or a single bond, A, B, C, D and E are each independently trans-1,4-cyclohexylene, pyrimidine-2,5-diyl 1,4-cyclohexenylene, or H in the side position may be substituted with F In the formulas (Ia), (Ib) and (Ic) , at least one of Z ^{1 to} Z ⁶ is —COO— or —CF ₂ O—. Yes. ) The nematic liquid crystal composition has the general formula ( I -B ') and ( I The liquid crystal display device according to claim 1, further comprising at least one compound represented by -c ′) in a proportion of 18% by weight or more based on the total weight of the liquid crystal composition.

(Wherein R ¹ Represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one of the groups or two or more methylene groups (-CH ₂ -) May be substituted by an oxygen atom or -CH = CH-. X is F, Cl, CF _Three , OCF _Three , CF ₂ H, OCF ₂ H, OCF ₂ CF ₂ H, OCF ₂ Cl or OCF ₂ CFHCF _Three Q ¹ Is F, Q ² Represents H or F and Z ² , Z ^Four And Z ^Five Are each independently -CH ₂ CH ₂ -,-(CH ₂ ) _Four -, -CH = CH-, or a single bond, Z ^Three And Z ⁶ Represents a single bond, and C and E may each independently be substituted with F at the side H 1 , 4-phenylene, B and D are each independently trans-1 , 4-cyclohexylene, pyrimidine-2 , 5-diyl, 1 , 4-cyclohexenylene or 1 in which H at the side may be substituted with F , 4-phenylene is shown. ) The amount of the first component, a liquid crystal display device according to 請 Motomeko 1 or 2 Ru 50-100 wt% der relative to the total weight of the liquid crystal composition. The nematic liquid crystal composition further contains at least one selected from the group of compounds represented by formulas ( II ), ( III ) and ( IV ) as the second component. A liquid crystal display element according to 1.

(In the formula, each of R ² and R ³ independently represents an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms, and any one or two or more methylene groups not adjacent to each other in the group are oxygen atoms. Or may be substituted by —CH═CH—, wherein G and J each independently represents trans-1,4-cyclohexylene, 1,4-phenylene, or pyrimidine-2,5-diyl, and Z ⁷ represents -CH ₂ CH _2- , -COO-, -CH = CH-, -C≡C-, or a single bond.

(Wherein R ⁴ and R ⁵ each independently represents an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms. In any case, any one of the groups or two or more methylene groups not adjacent to each other are May be substituted by an oxygen atom or -CH = CH-, K represents trans-1,4-cyclohexylene, 1,4-phenylene or pyrimidine-2,5-diyl, and L and M are each independently Or trans-1,4-cyclohexylene or 1,4-phenylene in which one H in the lateral position may be substituted with F. Z ⁸ and Z ⁹ are each independently —CH ₂ CH ₂ — , -CH = CH-, -C≡C-, -COO-, or a single bond.

(Wherein R ⁶ and R ⁷ each independently represents an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms, and any one or two or more methylene groups not adjacent to each other in the group are oxygen atoms or (It may be substituted by —CH═CH—. Q ³ represents H or F.) The amount of the second component, the liquid crystal display device according to 請 Motomeko 4 Ru der 40% by weight relative to the total weight of the liquid crystal composition. The nematic liquid crystal composition is selected from the group of compounds represented by general formulas (VI-a), (VI-b), (VI-c), (VI-d), and (VI-e) as the third component. The liquid crystal display element according to claim 4, further comprising at least one compound.

(In the formula, R ⁸ represents an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms, and any one or two or more methylene groups not adjacent to each other in the group are substituted with an oxygen atom or —CH═CH—. R ⁹ represents an alkyl group having 1 to 10 carbon atoms, a fluoroalkyl group, CF ₃ , or CF ₂ H, and one or two or more methylene groups not adjacent to each other in the group are oxygen atoms. Or may be substituted by —CH═CH—, and Z ¹⁰ and Z ¹¹ each independently represent —CH ₂ CH ₂ —, —COO— or a single bond. The amount of the third component, the liquid crystal display device according to 請 Motomeko 6 Ru der 20% by weight relative to the total weight of the liquid crystal composition. The nematic phase range of the liquid crystal composition is 60 ° C. or more, the optical anisotropy Δn is 0.1 or more, the elastic constant ratio K ₃ / K _{1 of} the spray and bend is 1.7 or less, and the dielectric anisotropy Δε is 5. the liquid crystal display device according to any one of 0 or more der Ru請 Motomeko 1-7. a) Using a sealed cell formed of two substrates having transparent electrodes,
b) The cell contains a nematic liquid crystal mixture having a positive dielectric anisotropy and a high resistance value,
c) The rubbing directions of the alignment films applied on the two upper and lower substrates are the same direction (twist angle 0 degree),
d) When the angle between the pretilt direction of the liquid crystal on the alignment film and the substrate is + θ, the other is −θ,
e) A biaxial retardation film is disposed on the upper substrate of the upper and lower substrates of the cell, and polarizing plates are disposed above and below the cell where the biaxial retardation film is disposed,
f) In an actively driven OCB (Optically Compensated Bend or Birefringence) element that switches the individual pixels of this sealed cell,
Liquid crystal composition for a liquid crystal display device , wherein the nematic liquid crystal composition contains at least one compound represented by the following general formulas ( I- a), ( I- b) and ( I- c) as a first component: Use of.

(Wherein R ¹ represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one or two or more methylene groups (—CH ₂ —) not adjacent to each other in the group are oxygen atoms or — C H = may be replaced by CH- .X is _{F, Cl, CF 3, OCF} 3, CF 2 H, OCF 2 H, OCF 2 CF 2 H, indicates OCF ₂ Cl or OCF ₂ CFHCF _3,, Q ¹ and Q ² represent F, and Z ¹ , Z ² , Z ³ , Z ⁴ , Z ⁵ , and Z ⁶ are each independently —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —COO. _{-, - CF 2 O -,} - CH = CH-, or a single bond, a, B, C, D, and E are each independently trans-1,4-cyclohexylene, pyrimidine-2,5 Diyl, 1,4-cyclohexenylene, or 1,4-position H may be substituted with F Shows the Eniren. However, formula (I-a), in (I-b) and each of the formula (I-c), at least one of Z ¹ to Z ⁶ is -COO- or -CF ₂ O-in is there.) The nematic liquid crystal composition has the general formula ( I -B ') and ( I The liquid crystal composition for a liquid crystal display device according to claim 9, further containing at least one compound represented by -c ') in a proportion of 18% by weight or more based on the total weight of the liquid crystal composition. Use of.

(Wherein R ¹ Represents an alkyl group having 1 to 10 carbon atoms or a fluoroalkyl group, and any one of the groups or two or more methylene groups (-CH ₂ -) May be substituted by an oxygen atom or -CH = CH-. X is F, Cl, CF _Three , OCF _Three , CF ₂ H, OCF ₂ H, OCF ₂ CF ₂ H, OCF ₂ Cl or OCF ₂ CFHCF _Three Q ¹ Is F, Q ² Represents H or F and Z ² , Z ^Four And Z ^Five Are each independently -CH ₂ CH ₂ -,-(CH ₂ ) _Four -, -CH = CH-, or a single bond, Z ^Three And Z ⁶ Represents a single bond, and C and E may each independently be substituted with F at the side H 1 , 4-phenylene, B and D are each independently trans-1 , 4-cyclohexylene, pyrimidine-2 , 5-diyl, 1 , 4-cyclohexenylene or 1 in which H at the side may be substituted with F , 4-phenylene is shown. ) The liquid crystal according to claim 9 or 10, wherein the nematic liquid crystal composition further contains at least one selected from the group of compounds represented by formulas ( II ), ( III ) and ( VI ) as the second component. Use of a liquid crystal composition for a display element.

(In the formula, R ² and R ³ each independently represent an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms, and any one of the groups or two or more methylene groups not adjacent to each other are oxygen atoms. Or may be substituted by —CH═CH—, G and J each independently represents trans-1,4-cyclohexylene, 1,4-phenylene or pyrimidine-2,5-diyl, and Z ⁷ represents — CH ₂ CH ₂ —, —COO—, —CH═CH—, —C≡C—, or a single bond.

(Wherein R ⁴ and R ⁵ each independently represents an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms. In any case, any one of the groups or two or more methylene groups not adjacent to each other are May be substituted by an oxygen atom or -CH = CH-, K represents trans-1,4-cyclohexylene, 1,4-phenylene or pyrimidine-2,5-diyl, and L and M are each independently Or trans-1,4-cyclohexylene or 1,4-phenylene in which one H in the lateral position may be substituted with F. Z ⁸ and Z ⁹ are each independently —CH ₂ CH ₂ — , -CH = CH-, -C≡C-, -COO-, or a single bond.

(Wherein R ⁶ and R ⁷ each independently represents an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms, and any one or two or more methylene groups not adjacent to each other in the group are oxygen atoms or (It may be substituted by —CH═CH—. Q ³ represents H or F.) The nematic liquid crystal composition is selected from the group of compounds represented by the general formulas ( VI- a), ( VI- b), ( VI- c), ( VI- d), and ( VI- e) as the third component. The use of a liquid crystal composition for a liquid crystal display device according to claim 11, further comprising at least one compound.

(In the formula, R ⁸ represents an alkyl group or fluoroalkyl group having 1 to 10 carbon atoms, and any one or two or more methylene groups not adjacent to each other in the group are substituted with an oxygen atom or —CH═CH—. R ⁹ represents an alkyl group having 1 to 10 carbon atoms, a fluoroalkyl group, CF ₃ or CF ₂ H, and one or two or more methylene groups not adjacent to each other in the group are oxygen atoms or — And may be substituted by CH═CH—, Z ¹⁰ and Z ¹¹ each independently represent —CH ₂ CH ₂ —, —COO— or a single bond.